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Question:

Margaret is getting married and must be ready by 11:15 a.m. If it’s now 8:30 a.m., how much time does she have to get ready?

A 2 3/4 hours
Explaination

The amount of time from 8:30 a.m. to 11:15 a.m. is 2 hours and 45 minutes, or 245/60. To reduce the fraction, divide 45 by 60 to get 0.75, or 3/4. The total amount of time Margaret has to get ready is 23/4 hours.