1912.5% is the change from 40 to 805
Calculation steps:
[( 805 - 40 ) ÷ 40] x 100 = 1912.5%
Formula
Percentage change = [(805 - 40) / 40] x 100
Subtract the new number by the original number
805 - 40 = 765
765 ÷ 40 = 19.125
19.125 x 100 = 1912.5%
Example