-42.3% is the change from 331 to 191
Calculation steps:
[( 191 - 331 ) ÷ 331] x 100 = -42.3%
Formula
Percentage change = [(191 - 331) / 331] x 100
Subtract the new number by the original number
191 - 331 = -140
-140 ÷ 331 = -0.4229607250755287
-0.4229607250755287 x 100 = -42.3%