-15.9% is the change from 780 to 656
Calculation steps:
[( 656 - 780 ) ÷ 780] x 100 = -15.9%
Formula
Percentage change = [(656 - 780) / 780] x 100
Subtract the new number by the original number
656 - 780 = -124
-124 ÷ 780 = -0.15897435897435896
-0.15897435897435896 x 100 = -15.9%