256.25% is the change from 256 to 912
Calculation steps:
[( 912 - 256 ) ÷ 256] x 100 = 256.25%
Formula
Percentage change = [(912 - 256) / 256] x 100
Subtract the new number by the original number
912 - 256 = 656
656 ÷ 256 = 2.5625
2.5625 x 100 = 256.25%