830.86% is the change from 81 to 754
Calculation steps:
[( 754 - 81 ) ÷ 81] x 100 = 830.86%
Formula
Percentage change = [(754 - 81) / 81] x 100
Subtract the new number by the original number
754 - 81 = 673
673 ÷ 81 = 8.308641975308642
8.308641975308642 x 100 = 830.86%