-12.99% is the change from 331 to 288
Calculation steps:
[( 288 - 331 ) ÷ 331] x 100 = -12.99%
Formula
Percentage change = [(288 - 331) / 331] x 100
Subtract the new number by the original number
288 - 331 = -43
-43 ÷ 331 = -0.1299093655589124
-0.1299093655589124 x 100 = -12.99%