-65.94% is the change from 502 to 171
Calculation steps:
[( 171 - 502 ) ÷ 502] x 100 = -65.94%
Formula
Percentage change = [(171 - 502) / 502] x 100
Subtract the new number by the original number
171 - 502 = -331
-331 ÷ 502 = -0.6593625498007968
-0.6593625498007968 x 100 = -65.94%