250% is the change from 256 to 896
Calculation steps:
[( 896 - 256 ) ÷ 256] x 100 = 250%
Formula
Percentage change = [(896 - 256) / 256] x 100
Subtract the new number by the original number
896 - 256 = 640
640 ÷ 256 = 2.5
2.5 x 100 = 250%
Example