Question

A.

Three of the cars in the race weighed less than 600
pounds. These cars made up 10% of all the cars.
How many cars were there in the race?

Answer 1

Angela, a proportion is two equal ratios, kinda like 3/4 = 6/8.

If we call the number of cars c, then our proportion is 3/10 = c/100.

Cross multiplying, we get 10c = 300.

Dividing both sides by 10, c = 30.

Answer 2

• 30 cars

Explanation:

3 cars made up 10% of all the cars x:

• 3 ⇒ 10%
• x ⇒ 100%
• x = 3*100/10 = 30