1892.5% is the change from 40 to 797
Calculation steps:
[( 797 - 40 ) ÷ 40] x 100 = 1892.5%
Formula
Percentage change = [(797 - 40) / 40] x 100
Subtract the new number by the original number
797 - 40 = 757
757 ÷ 40 = 18.925
18.925 x 100 = 1892.5%
Example