-24.66% is the change from 515 to 388
Calculation steps:
[( 388 - 515 ) ÷ 515] x 100 = -24.66%
Formula
Percentage change = [(388 - 515) / 515] x 100
Subtract the new number by the original number
388 - 515 = -127
-127 ÷ 515 = -0.24660194174757283
-0.24660194174757283 x 100 = -24.66%