15.32% is the change from 222 to 256
Calculation steps:
[( 256 - 222 ) ÷ 222] x 100 = 15.32%
Formula
Percentage change = [(256 - 222) / 222] x 100
Subtract the new number by the original number
256 - 222 = 34
34 ÷ 222 = 0.15315315315315314
0.15315315315315314 x 100 = 15.32%