Emily is entering a bicycle race for charity. Her mother pledges $0.90 for every 0.75 mile she bikes. If Emily bikes 18 miles, how much will her mother donate?

21.6 is the payment amount from mom to Emily

Step-by-step explanation:

Proportion

Payment / unit distance = total payment/total distance

Givens

Payment = 0.90 Unit distance = 0.75 miles Total payment = x Total distance = 18 miles

Solution

0.9/0.75 = x / 18 Multiply both sides by 18

0.9 * 18/0.75 = x * 18/18 Simplify.

16.2 / 0.75 = x Simply the left

21.60 = x