-88.85% is the change from 771 to 86
Calculation steps:
[( 86 - 771 ) ÷ 771] x 100 = -88.85%
Formula
Percentage change = [(86 - 771) / 771] x 100
Subtract the new number by the original number
86 - 771 = -685
-685 ÷ 771 = -0.8884565499351491
-0.8884565499351491 x 100 = -88.85%