reverse percentages??

annie0000 | 09:26 Tue 21st Jun 2011 | ChatterBank

6 Answers

Can anyone tell me quickly how to do reverse percentages as my memory is failing me here. For example, I know that 21 is 16% of the original number but need to calculate the original number.

Cheers.

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ChuckFickens

21/16*100

murraymints

toooooo early for that stuff....

jackthehat

Divide 21 by 16 and multiply the result by 100.

annie0000

Question Author

Fab, thanks all!

Ellipsis

In full ...

n times 16% is 21
Therefore n is 21 divided by 16%

16% is 16/100

Therefore n is 21/(16/100)
Therefore n is (21*100)/16

annie0000

Question Author

Thanks ellipsis - could have done with your help today - think the whole MI report is a pile of keek!!

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