-66% is the change from 503 to 171
Calculation steps:
[( 171 - 503 ) ÷ 503] x 100 = -66%
Formula
Percentage change = [(171 - 503) / 503] x 100
Subtract the new number by the original number
171 - 503 = -332
-332 ÷ 503 = -0.6600397614314115
-0.6600397614314115 x 100 = -66%