644.58% is the change from 83 to 618
Calculation steps:
[( 618 - 83 ) ÷ 83] x 100 = 644.58%
Formula
Percentage change = [(618 - 83) / 83] x 100
Subtract the new number by the original number
618 - 83 = 535
535 ÷ 83 = 6.445783132530121
6.445783132530121 x 100 = 644.58%