2162.5% is the change from 40 to 905
Calculation steps:
[( 905 - 40 ) ÷ 40] x 100 = 2162.5%
Formula
Percentage change = [(905 - 40) / 40] x 100
Subtract the new number by the original number
905 - 40 = 865
865 ÷ 40 = 21.625
21.625 x 100 = 2162.5%
Example