2247.5% is the change from 40 to 939
Calculation steps:
[( 939 - 40 ) ÷ 40] x 100 = 2247.5%
Formula
Percentage change = [(939 - 40) / 40] x 100
Subtract the new number by the original number
939 - 40 = 899
899 ÷ 40 = 22.475
22.475 x 100 = 2247.5%
Example