harleyquinn512011 harleyquinn512011

07-03-2017
Mathematics

contestada

81 is %18 of what number

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dory123 dory123

07-03-2017

You have to do the percent over 100 since it is a percent.
The equation should be percent/100=is/of.
percent:18 18/100
is:81 81/x
The equation is 18/100=81/x.
CROSS MULTIPLY to get 8100=18x.
Divide both sides by 18 to get 450.

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