903.7% is the change from 81 to 813
Calculation steps:
[( 813 - 81 ) ÷ 81] x 100 = 903.7%
Formula
Percentage change = [(813 - 81) / 81] x 100
Subtract the new number by the original number
813 - 81 = 732
732 ÷ 81 = 9.037037037037036
9.037037037037036 x 100 = 903.7%