-65.87% is the change from 501 to 171
Calculation steps:
[( 171 - 501 ) ÷ 501] x 100 = -65.87%
Formula
Percentage change = [(171 - 501) / 501] x 100
Subtract the new number by the original number
171 - 501 = -330
-330 ÷ 501 = -0.6586826347305389
-0.6586826347305389 x 100 = -65.87%