252.34% is the change from 256 to 902
Calculation steps:
[( 902 - 256 ) ÷ 256] x 100 = 252.34%
Formula
Percentage change = [(902 - 256) / 256] x 100
Subtract the new number by the original number
902 - 256 = 646
646 ÷ 256 = 2.5234375
2.5234375 x 100 = 252.34%