How to find a ratio Practice Test

There are 3,500 people in group A and 5,000 people in group B:

Car Type	% in Group A Who Own	% in Group B Who Own
Motorbike	4	9
Sedan	35	25
Minivan	22	15
Van	9	12
Coupe	3	6

What is the ratio of the number of people in group A with motorbikes and vans to the total number of people across both groups with motorbikes and vans?

If the length of a rectangle is increased by 50% and its width is decreased by 20%, what is the ratio of the area of the new rectangle to the original rectangle?

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