-36.73% is the change from 520 to 329
Calculation steps:
[( 329 - 520 ) ÷ 520] x 100 = -36.73%
Formula
Percentage change = [(329 - 520) / 520] x 100
Subtract the new number by the original number
329 - 520 = -191
-191 ÷ 520 = -0.36730769230769234
-0.36730769230769234 x 100 = -36.73%