-51.06% is the change from 331 to 162
Calculation steps:
[( 162 - 331 ) ÷ 331] x 100 = -51.06%
Formula
Percentage change = [(162 - 331) / 331] x 100
Subtract the new number by the original number
162 - 331 = -169
-169 ÷ 331 = -0.5105740181268882
-0.5105740181268882 x 100 = -51.06%