How to find the other half of a complementary angle?

A complemetary angle is one that adds up with another to equal 90 degrees. You subtract 90 degrees from the degree of the given angle

Example: Angle a is 54 degrees. To find the complementary angle you subtract 90 degrees from 54 degrees. You get 36 degrees. Angle b would be 36 degrees
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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.