2160% is the change from 40 to 904
Calculation steps:
[( 904 - 40 ) ÷ 40] x 100 = 2160%
Formula
Percentage change = [(904 - 40) / 40] x 100
Subtract the new number by the original number
904 - 40 = 864
864 ÷ 40 = 21.6
21.6 x 100 = 2160%
Example