901.23% is the change from 81 to 811
Calculation steps:
[( 811 - 81 ) ÷ 81] x 100 = 901.23%
Formula
Percentage change = [(811 - 81) / 81] x 100
Subtract the new number by the original number
811 - 81 = 730
730 ÷ 81 = 9.012345679012345
9.012345679012345 x 100 = 901.23%