67.97% is the change from 256 to 430
Calculation steps:
[( 430 - 256 ) ÷ 256] x 100 = 67.97%
Formula
Percentage change = [(430 - 256) / 256] x 100
Subtract the new number by the original number
430 - 256 = 174
174 ÷ 256 = 0.6796875
0.6796875 x 100 = 67.97%