525% is the change from 40 to 250
Calculation steps:
[( 250 - 40 ) ÷ 40] x 100 = 525%
Formula
Percentage change = [(250 - 40) / 40] x 100
Subtract the new number by the original number
250 - 40 = 210
210 ÷ 40 = 5.25
5.25 x 100 = 525%
Example