902.5% is the change from 40 to 401
Calculation steps:
[( 401 - 40 ) ÷ 40] x 100 = 902.5%
Formula
Percentage change = [(401 - 40) / 40] x 100
Subtract the new number by the original number
401 - 40 = 361
361 ÷ 40 = 9.025
9.025 x 100 = 902.5%
Example