Calculate the original number of a decreased percentage by dividing the result of decrease by the decimal number from subtracting 100 by the percent number divided by 100.
Formula:
X percent decrease of Z is Y
Z = Y ÷ [( 100 - X ) ÷ 100 ]
Example:
5 percent decrease of Z is 50
Z = 50 ÷ [( 100 - 5 ) ÷ 100 ] = 52.63
Example