1540% is the change from 40 to 656
Calculation steps:
[( 656 - 40 ) ÷ 40] x 100 = 1540%
Formula
Percentage change = [(656 - 40) / 40] x 100
Subtract the new number by the original number
656 - 40 = 616
616 ÷ 40 = 15.4
15.4 x 100 = 1540%
Example