657.5% is the change from 80 to 606
Calculation steps:
[( 606 - 80 ) ÷ 80] x 100 = 657.5%
Formula
Percentage change = [(606 - 80) / 80] x 100
Subtract the new number by the original number
606 - 80 = 526
526 ÷ 80 = 6.575
6.575 x 100 = 657.5%
Example