-86.77% is the change from 771 to 102
Calculation steps:
[( 102 - 771 ) ÷ 771] x 100 = -86.77%
Formula
Percentage change = [(102 - 771) / 771] x 100
Subtract the new number by the original number
102 - 771 = -669
-669 ÷ 771 = -0.867704280155642
-0.867704280155642 x 100 = -86.77%