-66.07% is the change from 504 to 171
Calculation steps:
[( 171 - 504 ) ÷ 504] x 100 = -66.07%
Formula
Percentage change = [(171 - 504) / 504] x 100
Subtract the new number by the original number
171 - 504 = -333
-333 ÷ 504 = -0.6607142857142857
-0.6607142857142857 x 100 = -66.07%