2120% is the change from 40 to 888
Calculation steps:
[( 888 - 40 ) ÷ 40] x 100 = 2120%
Formula
Percentage change = [(888 - 40) / 40] x 100
Subtract the new number by the original number
888 - 40 = 848
848 ÷ 40 = 21.2
21.2 x 100 = 2120%
Example