540% is the change from 125 to 800
Calculation steps:
[( 800 - 125 ) ÷ 125] x 100 = 540%
Formula
Percentage change = [(800 - 125) / 125] x 100
Subtract the new number by the original number
800 - 125 = 675
675 ÷ 125 = 5.4
5.4 x 100 = 540%
Example