840.91% is the change from 88 to 828
Calculation steps:
[( 828 - 88 ) ÷ 88] x 100 = 840.91%
Formula
Percentage change = [(828 - 88) / 88] x 100
Subtract the new number by the original number
828 - 88 = 740
740 ÷ 88 = 8.409090909090908
8.409090909090908 x 100 = 840.91%