What is the difference between 4/5 and 3/8

Answer : 17/40

4/5 - 3/8 =

32/40 - 15/40 = 17/40

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.

The answer is 1 because you have to flip the sign when dividing by negative number and 3