-34.33% is the change from 501 to 329
Calculation steps:
[( 329 - 501 ) ÷ 501] x 100 = -34.33%
Formula
Percentage change = [(329 - 501) / 501] x 100
Subtract the new number by the original number
329 - 501 = -172
-172 ÷ 501 = -0.34331337325349304
-0.34331337325349304 x 100 = -34.33%