13.84% is the change from 224 to 255
Calculation steps:
[( 255 - 224 ) ÷ 224] x 100 = 13.84%
Formula
Percentage change = [(255 - 224) / 224] x 100
Subtract the new number by the original number
255 - 224 = 31
31 ÷ 224 = 0.13839285714285715
0.13839285714285715 x 100 = 13.84%