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Martha arrived at the dentist's office at 2:30 pm. She didn't get to see the dentist until 2:45 pm. What fraction of an hour did she wait? Reduce your answer to lowest terms

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Answer:

There are 60 minutes in 1 hour

→ as a fraction of an hour 15 minutes is 15/60 hour = 1/4 hour

one quarter

15/60 = 3/12 = 1/4
First calculate how many minutes have passed. 45-40 = 15. Then divide that by the minutes in an hour: 15/60, then reduce to lowest terms 1/4

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