637.04% is the change from 81 to 597
Calculation steps:
[( 597 - 81 ) ÷ 81] x 100 = 637.04%
Formula
Percentage change = [(597 - 81) / 81] x 100
Subtract the new number by the original number
597 - 81 = 516
516 ÷ 81 = 6.37037037037037
6.37037037037037 x 100 = 637.04%