People usually measure short amounts of time in minutes. Sixty seconds make up a minute, while 60 minutes make up an hour. You can convert minutes into a percentage of an hour using basic division. For example, 30 minutes equals 50 percent of an hour, while 10 minutes equals about 17 percent of an hour. Calculating the percentage of an hour enables you to solve speed, time or distance problems, because speed is usually expressed in miles per hour.

Convert any seconds to a percentage of a minute by dividing by 60. For example, 14 minutes and 45 seconds equals 14.75 minutes, because 45/60 equals 0.75.

Divide the number of minutes by 60, the total number of minutes in an hour. For example, convert 14.75 minutes to a percentage by dividing 14.75 by 60, which equals about 0.246, or 24.6 percent.

Convert hours to minutes by multiplying by 60. For example, 50 percent of an hour equals 30 minutes, because 0.50 * 60 equals 30.