45 minutes equals (3/4) of an hour.
15 miles / (3/4) hr = 20 mph,
Remember the mnemonic for division of fractions: invert the denominator and multiply.
Suzie needs to ride her bike to the grocery store, which is is 15 miles away. It takes Suzie 45 minutes to bike to the grocery store. What is Suzies average speed? Express answer in miles per hour.
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