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A school board is proposing a 5% decrease in the length of the school day. Currently the school day is 7 hours (420 minutes) long. How many minutes shorter would the school day be with the proposed decrease?
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A school board is proposing a 5% decrease in the length of the school day. Currently the school day is 7 hours (420 minutes) long. How many minutes shorter would the school day be with the proposed decrease?

User Brent Rittenhouse
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The school day would be 21 minutes shorter.
5% of 420 is 21.
User VijayP
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