684.15% is the change from 82 to 643
Calculation steps:
[( 643 - 82 ) ÷ 82] x 100 = 684.15%
Formula
Percentage change = [(643 - 82) / 82] x 100
Subtract the new number by the original number
643 - 82 = 561
561 ÷ 82 = 6.841463414634147
6.841463414634147 x 100 = 684.15%