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# How to find the percentage decrease and its original value?

What percentage decrease is it necessary to restore a quantity to its original value if it has been increased by 360% or 18%?

and how to find the percentage increase necessary to restore to a quantity if it has been decreased by 18%?

### 2 Answers

- 7 years agoFavorite Answer
original value increased by 360% you would divide by 460 because of the original 100 and then multiply it by 100 to find the original value so if the increased value was 460 then divided by 460 would be 1 then 1 times 100 equals 100 therefore the original value was 100. If something was decreased by 18% then you would divide the value by 82 then you would multiply the quotient by 100 to get the original value. Example: 82 divided by 82 equals 1. 1 x 100=100 therefore the original value was 100.

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- spikerLv 43 years ago
artwork in fractions, no longer opportunities. V + 10% = V + 0.1V = (a million + 0.a million)V = a million.1V to lessen right down to V, a million.a million V x r = V r = V / a million.1V r = a million/a million.a million = 0.909, or 9.09% W - 80% = W - 0.8W = (a million - 0.8)W = 0.2W 0.2W x r = W r = W / 0.2W r = a million/0.2 = 5, it is 500%

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