-24.27% is the change from 515 to 390
Calculation steps:
[( 390 - 515 ) ÷ 515] x 100 = -24.27%
Formula
Percentage change = [(390 - 515) / 515] x 100
Subtract the new number by the original number
390 - 515 = -125
-125 ÷ 515 = -0.24271844660194175
-0.24271844660194175 x 100 = -24.27%