9.4% is the change from 234 to 256
Calculation steps:
[( 256 - 234 ) ÷ 234] x 100 = 9.4%
Formula
Percentage change = [(256 - 234) / 234] x 100
Subtract the new number by the original number
256 - 234 = 22
22 ÷ 234 = 0.09401709401709402
0.09401709401709402 x 100 = 9.4%