657.32% is the change from 82 to 621
Calculation steps:
[( 621 - 82 ) ÷ 82] x 100 = 657.32%
Formula
Percentage change = [(621 - 82) / 82] x 100
Subtract the new number by the original number
621 - 82 = 539
539 ÷ 82 = 6.573170731707317
6.573170731707317 x 100 = 657.32%