-15.23% is the change from 302 to 256
Calculation steps:
[( 256 - 302 ) ÷ 302] x 100 = -15.23%
Formula
Percentage change = [(256 - 302) / 302] x 100
Subtract the new number by the original number
256 - 302 = -46
-46 ÷ 302 = -0.152317880794702
-0.152317880794702 x 100 = -15.23%