The comparison of two quantities that have different units is known as rate. For example, $30 Per Hour. Unit rate can be considered as a special type of rate where the second amount is 1. We can use the word ‘per’ for the unit rates. For example $30 Per Hour can be written as $30 every hour. The formula to calculate unit rate is a/b or a:b where, a and b are two different quantities.

Grade 6

Ratios And Rates

6.RP.A.3.B