523.75% is the change from 80 to 499
Calculation steps:
[( 499 - 80 ) ÷ 80] x 100 = 523.75%
Formula
Percentage change = [(499 - 80) / 80] x 100
Subtract the new number by the original number
499 - 80 = 419
419 ÷ 80 = 5.2375
5.2375 x 100 = 523.75%
Example