-89.75% is the change from 771 to 79
Calculation steps:
[( 79 - 771 ) ÷ 771] x 100 = -89.75%
Formula
Percentage change = [(79 - 771) / 771] x 100
Subtract the new number by the original number
79 - 771 = -692
-692 ÷ 771 = -0.8975356679636836
-0.8975356679636836 x 100 = -89.75%