-40.18% is the change from 331 to 198
Calculation steps:
[( 198 - 331 ) ÷ 331] x 100 = -40.18%
Formula
Percentage change = [(198 - 331) / 331] x 100
Subtract the new number by the original number
198 - 331 = -133
-133 ÷ 331 = -0.40181268882175225
-0.40181268882175225 x 100 = -40.18%