550% is the change from 80 to 520
Calculation steps:
[( 520 - 80 ) ÷ 80] x 100 = 550%
Formula
Percentage change = [(520 - 80) / 80] x 100
Subtract the new number by the original number
520 - 80 = 440
440 ÷ 80 = 5.5
5.5 x 100 = 550%
Example