Question

What is the percent of change between the Unit rate of Car A and the Unit rate of Car B?

Answer 1

Car A travels 60 miles in 5 gallons of gas

so its mileage is 60/5 = 12

Car B travels 60 miles in 4 gallons of gas

so its mileage is 60/4 = 15

so change in unit rate in both the car is 15 - 12 = 3

so the percentage change is

$\frac{3}{15}\times100\text{ = 20}$

the change is 20 %