-49.55% is the change from 331 to 167
Calculation steps:
[( 167 - 331 ) ÷ 331] x 100 = -49.55%
Formula
Percentage change = [(167 - 331) / 331] x 100
Subtract the new number by the original number
167 - 331 = -164
-164 ÷ 331 = -0.4954682779456193
-0.4954682779456193 x 100 = -49.55%