-15.79% is the change from 342 to 288
Calculation steps:
[( 288 - 342 ) ÷ 342] x 100 = -15.79%
Formula
Percentage change = [(288 - 342) / 342] x 100
Subtract the new number by the original number
288 - 342 = -54
-54 ÷ 342 = -0.15789473684210525
-0.15789473684210525 x 100 = -15.79%