-29% is the change from 331 to 235
Calculation steps:
[( 235 - 331 ) ÷ 331] x 100 = -29%
Formula
Percentage change = [(235 - 331) / 331] x 100
Subtract the new number by the original number
235 - 331 = -96
-96 ÷ 331 = -0.29003021148036257
-0.29003021148036257 x 100 = -29%