-30.49% is the change from 246 to 171
Calculation steps:
[( 171 - 246 ) ÷ 246] x 100 = -30.49%
Formula
Percentage change = [(171 - 246) / 246] x 100
Subtract the new number by the original number
171 - 246 = -75
-75 ÷ 246 = -0.3048780487804878
-0.3048780487804878 x 100 = -30.49%