878.31% is the change from 83 to 812
Calculation steps:
[( 812 - 83 ) ÷ 83] x 100 = 878.31%
Formula
Percentage change = [(812 - 83) / 83] x 100
Subtract the new number by the original number
812 - 83 = 729
729 ÷ 83 = 8.783132530120483
8.783132530120483 x 100 = 878.31%