-64.07% is the change from 501 to 180
Calculation steps:
[( 180 - 501 ) ÷ 501] x 100 = -64.07%
Formula
Percentage change = [(180 - 501) / 501] x 100
Subtract the new number by the original number
180 - 501 = -321
-321 ÷ 501 = -0.6407185628742516
-0.6407185628742516 x 100 = -64.07%