827.71% is the change from 83 to 770
Calculation steps:
[( 770 - 83 ) ÷ 83] x 100 = 827.71%
Formula
Percentage change = [(770 - 83) / 83] x 100
Subtract the new number by the original number
770 - 83 = 687
687 ÷ 83 = 8.27710843373494
8.27710843373494 x 100 = 827.71%