Question

at McDonald's, you get a $1 coupon for every 3 fries you buy. What is the least number of fries you could buy in $10 in coupons?

Answer 1

Answer: 10 x 3 = 30
1 coupon= 3
10 coupon= 30

Answer 2

You must buy at least 30 fries to get 10 dollar ins coupons

Explanation:

We can write a ratio to find the minimum

1 dollar 10 dollars

--------------- = -------------

3 fries x fries

Using cross products

1 *x = 10 * 3

x = 30

You must buy at least 30 fries to get 10 dollar ins coupons