634.57% is the change from 81 to 595
Calculation steps:
[( 595 - 81 ) ÷ 81] x 100 = 634.57%
Formula
Percentage change = [(595 - 81) / 81] x 100
Subtract the new number by the original number
595 - 81 = 514
514 ÷ 81 = 6.345679012345679
6.345679012345679 x 100 = 634.57%