Portions of Time

An hour is made up of 60 minutes. Each minute is 1/60 of an hour.

a quarter of an hour = 15 minutes, or 15/60 = 1/4 = 0.25 of an hour

a half of an hour = 30 minutes or 30/60 = 1/2 = 0.5 of an hour

three quarters of an hour is 45 minutes or 45/60 = 3/4 = 0.75 of an hour

So, we could find the decimal amount by doing the number of minutes divided by 60

Example:

17 minutes = 17/60 = or 0.28 of an hour

To use time, we will probably need it as a decimal:)

For Example, if you make $30/hour and work for 4 1/2 hours, how much will you make?

30/hour x 4 1/2 hours

30 x 4.5 = $135

or

If you clock in at 3:30 and clock out at 5:45, how long did you work?

3:30-4 = 30 minutes

4-5 = 60 minutes

5-5:45 = 45 minutes

add them up = 135 minutes. Divide by 60 to find the hours...

135/60 = 2.25 hours

what is .25 hours? that's a quarter of an hour...0.25 x 60 = 15 minutes

The big reminder is that the decimal is NOT the number of minutes...it's the fraction of the hour

that "fraction of an hour" is the decimal x 60...