-56.6% is the change from 394 to 171
Calculation steps:
[( 171 - 394 ) ÷ 394] x 100 = -56.6%
Formula
Percentage change = [(171 - 394) / 394] x 100
Subtract the new number by the original number
171 - 394 = -223
-223 ÷ 394 = -0.565989847715736
-0.565989847715736 x 100 = -56.6%