-9.72% is the change from 288 to 260
Calculation steps:
[( 260 - 288 ) ÷ 288] x 100 = -9.72%
Formula
Percentage change = [(260 - 288) / 288] x 100
Subtract the new number by the original number
260 - 288 = -28
-28 ÷ 288 = -0.09722222222222222
-0.09722222222222222 x 100 = -9.72%