950.62% is the change from 81 to 851
Calculation steps:
[( 851 - 81 ) ÷ 81] x 100 = 950.62%
Formula
Percentage change = [(851 - 81) / 81] x 100
Subtract the new number by the original number
851 - 81 = 770
770 ÷ 81 = 9.506172839506172
9.506172839506172 x 100 = 950.62%