-20% is the change from 360 to 288
Calculation steps:
[( 288 - 360 ) ÷ 360] x 100 = -20%
Formula
Percentage change = [(288 - 360) / 360] x 100
Subtract the new number by the original number
288 - 360 = -72
-72 ÷ 360 = -0.2
-0.2 x 100 = -20%
Example