649.38% is the change from 81 to 607
Calculation steps:
[( 607 - 81 ) ÷ 81] x 100 = 649.38%
Formula
Percentage change = [(607 - 81) / 81] x 100
Subtract the new number by the original number
607 - 81 = 526
526 ÷ 81 = 6.493827160493828
6.493827160493828 x 100 = 649.38%