-9.41% is the change from 85 to 77
Calculation steps:
[( 77 - 85 ) ÷ 85] x 100 = -9.41%
Formula
Percentage change = [(77 - 85) / 85] x 100
Subtract the new number by the original number
77 - 85 = -8
-8 ÷ 85 = -0.09411764705882353
-0.09411764705882353 x 100 = -9.41%