248.05% is the change from 256 to 891
Calculation steps:
[( 891 - 256 ) ÷ 256] x 100 = 248.05%
Formula
Percentage change = [(891 - 256) / 256] x 100
Subtract the new number by the original number
891 - 256 = 635
635 ÷ 256 = 2.48046875
2.48046875 x 100 = 248.05%