-35.53% is the change from 501 to 323
Calculation steps:
[( 323 - 501 ) ÷ 501] x 100 = -35.53%
Formula
Percentage change = [(323 - 501) / 501] x 100
Subtract the new number by the original number
323 - 501 = -178
-178 ÷ 501 = -0.35528942115768464
-0.35528942115768464 x 100 = -35.53%