SSAT Upper Level Math : Fractions and Percentage

Study concepts, example questions & explanations for SSAT Upper Level Math

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Example Questions

Example Question #1 : Fractions And Percentage

Convert \(\displaystyle \frac{7}{9}\) to a percent.

Possible Answers:

\(\displaystyle 0.78\%\)

\(\displaystyle 77.8\%\)

\(\displaystyle 80\%\)

\(\displaystyle 76\%\)

Correct answer:

\(\displaystyle 77.8\%\)

Explanation:

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{7}{9}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 9x=700\)

\(\displaystyle x=\frac{700}{9}=77.8\)

Example Question #1 : How To Find Percentage From A Fraction

In a classroom, \(\displaystyle 9\) out of \(\displaystyle 11\) students own dogs. What percent of the class owns a dog?

Possible Answers:

\(\displaystyle 85.1\%\)

\(\displaystyle 81.8\%\)

\(\displaystyle 1.18\%\)

\(\displaystyle 0.81\%\)

Correct answer:

\(\displaystyle 81.8\%\)

Explanation:

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{9}{11}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 11x=900\)

\(\displaystyle x=\frac{900}{11}=81.8\)

Example Question #1 : How To Find Percentage From A Fraction

\(\displaystyle \frac{6}{13}\) of Julian's songs are rock songs. What percentage of his songs are rock songs?

Possible Answers:

\(\displaystyle 49\%\)

\(\displaystyle 47.2\%\)

\(\displaystyle 0.462\%\)

\(\displaystyle 46.2\%\)

Correct answer:

\(\displaystyle 46.2\%\)

Explanation:

This question wants you to find the percentage equivalent of \(\displaystyle \frac{6}{13}\).

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{6}{13}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 13x=600\)

\(\displaystyle x=\frac{600}{13}=46.2\)

Example Question #2 : Fractions And Percentage

Out of all of Ambrose's computer games, \(\displaystyle \frac{5}{8}\) are simulation games. What percentage of Ambrose's games are simulation games?

Possible Answers:

\(\displaystyle 0.625\%\)

\(\displaystyle 68.4\%\)

\(\displaystyle 62.5\%\)

\(\displaystyle 42.5\%\)

Correct answer:

\(\displaystyle 62.5\%\)

Explanation:

This question is asking you to convert \(\displaystyle \frac{5}{8}\) into a percent.

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{5}{8}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 8x=500\)

\(\displaystyle x=\frac{500}{8}=62.5\)

Example Question #3 : Fractions And Percentage

Convert \(\displaystyle \frac{15}{22}\) into a percentage.

Possible Answers:

\(\displaystyle 72.8\%\)

\(\displaystyle 68.2\%\)

\(\displaystyle 0.682\%\)

\(\displaystyle 6.82\%\)

Correct answer:

\(\displaystyle 68.2\%\)

Explanation:

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{15}{22}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 22x=1500\)

\(\displaystyle x=\frac{1500}{22}=68.2\)

Example Question #1 : Fractions And Percentage

Express \(\displaystyle \frac{5}{6}\) as a percentage.

Possible Answers:

\(\displaystyle 83.3\%\)

\(\displaystyle 8.12\%\)

\(\displaystyle 8.33\%\)

\(\displaystyle 82.5\%\)

Correct answer:

\(\displaystyle 83.3\%\)

Explanation:

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{5}{6}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 6x=500\)

\(\displaystyle x=\frac{500}{6}=83.3\)

Example Question #402 : Fractions

In a poll, \(\displaystyle 3\) out of \(\displaystyle 8\) people claimed that chocolate cake was their favorite dessert. What percentage of people said chocolate cake was their favorite dessert?

Possible Answers:

\(\displaystyle 37.5\%\)

\(\displaystyle 35.7\%\)

\(\displaystyle 32.9\%\)

\(\displaystyle 2.75\%\)

Correct answer:

\(\displaystyle 37.5\%\)

Explanation:

The question is asking you to convert \(\displaystyle \frac{3}{8}\) into a percentage.

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{3}{8}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 8x=300\)

\(\displaystyle x=\frac{300}{8}=37.5\)

Example Question #3 : Fractions And Percentage

In a survey, \(\displaystyle 12\) out of \(\displaystyle 15\) people said that their favorite sport was ice hockey. What percent of respondents' favorite sport is ice hockey?

Possible Answers:

\(\displaystyle 8\%\)

\(\displaystyle 80\%\)

\(\displaystyle 75\%\)

\(\displaystyle 90\%\)

Correct answer:

\(\displaystyle 80\%\)

Explanation:

The question is asking you to convert \(\displaystyle \frac{12}{15}\) into a percent.

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{12}{15}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 15x=1200\)

\(\displaystyle x=\frac{1200}{15}=80\)

Example Question #462 : Number Concepts And Operations

In a poll of \(\displaystyle 50\) students, \(\displaystyle 45\) of them said math was their favorite subject. What percentage of students claimed math was their favorite subject?

Possible Answers:

\(\displaystyle 70\%\)

\(\displaystyle 9\%\)

\(\displaystyle 95\%\)

\(\displaystyle 90\%\)

Correct answer:

\(\displaystyle 90\%\)

Explanation:

The question is asking you to convert the fraction \(\displaystyle \frac{45}{50}\) into a percentage.

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{45}{50}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 50x=4500\)

\(\displaystyle x=\frac{4500}{50}=90\)

Example Question #4 : Fractions And Percentage

In a class of \(\displaystyle 24\) students, \(\displaystyle 15\) of them said they have a brother. What percentage of the class has a brother?

Possible Answers:

\(\displaystyle 62.5\%\)

\(\displaystyle 55.5\%\)

\(\displaystyle 6.52\%\)

\(\displaystyle 12\%\)

Correct answer:

\(\displaystyle 62.5\%\)

Explanation:

The question is asking you to convert \(\displaystyle \frac{15}{24}\) to a percent.

Percent also means out of one hundred. Set up the following ratio to find the percent value.

\(\displaystyle \frac{15}{24}=\frac{x}{100}\)

Now, solve for \(\displaystyle x\), which will be the percent value because in the ratio we set up, \(\displaystyle x\) is the numerator of a fraction with a denominator of \(\displaystyle 100\).

\(\displaystyle 24x=1500\)

\(\displaystyle x=\frac{1500}{24}=62.5\)

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