877.65% is the change from 85 to 831
Calculation steps:
[( 831 - 85 ) ÷ 85] x 100 = 877.65%
Formula
Percentage change = [(831 - 85) / 85] x 100
Subtract the new number by the original number
831 - 85 = 746
746 ÷ 85 = 8.776470588235295
8.776470588235295 x 100 = 877.65%