70.31% is the change from 256 to 436
Calculation steps:
[( 436 - 256 ) ÷ 256] x 100 = 70.31%
Formula
Percentage change = [(436 - 256) / 256] x 100
Subtract the new number by the original number
436 - 256 = 180
180 ÷ 256 = 0.703125
0.703125 x 100 = 70.31%