-88.87% is the change from 773 to 86
Calculation steps:
[( 86 - 773 ) ÷ 773] x 100 = -88.87%
Formula
Percentage change = [(86 - 773) / 773] x 100
Subtract the new number by the original number
86 - 773 = -687
-687 ÷ 773 = -0.888745148771022
-0.888745148771022 x 100 = -88.87%