14-12-2017
Mathematics

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don't understand need help.on both

dont understand need helpon both class=

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14-12-2017

15% written as decimal is 0.15, multiply this by the number to get 15% of that number.

0.15x = 18
x = 18/0.15
x = 120

Now the percent is the unknown number. We'll use p for percent.
110p = 88
p = 88/110
p = 0.8
written as a percent (multiply by 100) = 80%

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