646.34% is the change from 82 to 612
Calculation steps:
[( 612 - 82 ) ÷ 82] x 100 = 646.34%
Formula
Percentage change = [(612 - 82) / 82] x 100
Subtract the new number by the original number
612 - 82 = 530
530 ÷ 82 = 6.463414634146342
6.463414634146342 x 100 = 646.34%