1917.5% is the change from 40 to 807
Calculation steps:
[( 807 - 40 ) ÷ 40] x 100 = 1917.5%
Formula
Percentage change = [(807 - 40) / 40] x 100
Subtract the new number by the original number
807 - 40 = 767
767 ÷ 40 = 19.175
19.175 x 100 = 1917.5%
Example