-44.12% is the change from 306 to 171
Calculation steps:
[( 171 - 306 ) ÷ 306] x 100 = -44.12%
Formula
Percentage change = [(171 - 306) / 306] x 100
Subtract the new number by the original number
171 - 306 = -135
-135 ÷ 306 = -0.4411764705882353
-0.4411764705882353 x 100 = -44.12%