581.25% is the change from 80 to 545
Calculation steps:
[( 545 - 80 ) ÷ 80] x 100 = 581.25%
Formula
Percentage change = [(545 - 80) / 80] x 100
Subtract the new number by the original number
545 - 80 = 465
465 ÷ 80 = 5.8125
5.8125 x 100 = 581.25%
Example