-19.8% is the change from 818 to 656
Calculation steps:
[( 656 - 818 ) ÷ 818] x 100 = -19.8%
Formula
Percentage change = [(656 - 818) / 818] x 100
Subtract the new number by the original number
656 - 818 = -162
-162 ÷ 818 = -0.1980440097799511
-0.1980440097799511 x 100 = -19.8%