-12.73% is the change from 330 to 288
Calculation steps:
[( 288 - 330 ) ÷ 330] x 100 = -12.73%
Formula
Percentage change = [(288 - 330) / 330] x 100
Subtract the new number by the original number
288 - 330 = -42
-42 ÷ 330 = -0.12727272727272726
-0.12727272727272726 x 100 = -12.73%