What is the surface area?
8 ft
7 ft
4 ft

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

How much is 32 out of 40 written as a percentage? convert fraction (ratio) 32 / 40 answer:   80%