977.78% is the change from 81 to 873
Calculation steps:
[( 873 - 81 ) ÷ 81] x 100 = 977.78%
Formula
Percentage change = [(873 - 81) / 81] x 100
Subtract the new number by the original number
873 - 81 = 792
792 ÷ 81 = 9.777777777777779
9.777777777777779 x 100 = 977.78%