-11.11% is the change from 288 to 256
Calculation steps:
[( 256 - 288 ) ÷ 288] x 100 = -11.11%
Formula
Percentage change = [(256 - 288) / 288] x 100
Subtract the new number by the original number
256 - 288 = -32
-32 ÷ 288 = -0.1111111111111111
-0.1111111111111111 x 100 = -11.11%