-88.32% is the change from 779 to 91
Calculation steps:
[( 91 - 779 ) ÷ 779] x 100 = -88.32%
Formula
Percentage change = [(91 - 779) / 779] x 100
Subtract the new number by the original number
91 - 779 = -688
-688 ÷ 779 = -0.883183568677792
-0.883183568677792 x 100 = -88.32%