916.05% is the change from 81 to 823
Calculation steps:
[( 823 - 81 ) ÷ 81] x 100 = 916.05%
Formula
Percentage change = [(823 - 81) / 81] x 100
Subtract the new number by the original number
823 - 81 = 742
742 ÷ 81 = 9.160493827160494
9.160493827160494 x 100 = 916.05%