-79.77% is the change from 771 to 156
Calculation steps:
[( 156 - 771 ) ÷ 771] x 100 = -79.77%
Formula
Percentage change = [(156 - 771) / 771] x 100
Subtract the new number by the original number
156 - 771 = -615
-615 ÷ 771 = -0.7976653696498055
-0.7976653696498055 x 100 = -79.77%