682.93% is the change from 82 to 642
Calculation steps:
[( 642 - 82 ) ÷ 82] x 100 = 682.93%
Formula
Percentage change = [(642 - 82) / 82] x 100
Subtract the new number by the original number
642 - 82 = 560
560 ÷ 82 = 6.829268292682927
6.829268292682927 x 100 = 682.93%