-63.5% is the change from 515 to 188
Calculation steps:
[( 188 - 515 ) ÷ 515] x 100 = -63.5%
Formula
Percentage change = [(188 - 515) / 515] x 100
Subtract the new number by the original number
188 - 515 = -327
-327 ÷ 515 = -0.6349514563106796
-0.6349514563106796 x 100 = -63.5%