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02-12-2018
Mathematics

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during 2006, a swimming lesson at a particular school lasted 45 minutes

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02-12-2018

Percent change =100%*(new value-old value)/(old value)
If result is positive, it is an increase. If the value is negative it is a decrease.
100%*(50-45)45=100% *(5/45) =11.11 %

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