1910% is the change from 40 to 804
Calculation steps:
[( 804 - 40 ) ÷ 40] x 100 = 1910%
Formula
Percentage change = [(804 - 40) / 40] x 100
Subtract the new number by the original number
804 - 40 = 764
764 ÷ 40 = 19.1
19.1 x 100 = 1910%
Example