612.5% is the change from 40 to 285
Calculation steps:
[( 285 - 40 ) ÷ 40] x 100 = 612.5%
Formula
Percentage change = [(285 - 40) / 40] x 100
Subtract the new number by the original number
285 - 40 = 245
245 ÷ 40 = 6.125
6.125 x 100 = 612.5%
Example