497.5% is the change from 80 to 478
Calculation steps:
[( 478 - 80 ) ÷ 80] x 100 = 497.5%
Formula
Percentage change = [(478 - 80) / 80] x 100
Subtract the new number by the original number
478 - 80 = 398
398 ÷ 80 = 4.975
4.975 x 100 = 497.5%
Example