251.36% is the change from 257 to 903
Calculation steps:
[( 903 - 257 ) ÷ 257] x 100 = 251.36%
Formula
Percentage change = [(903 - 257) / 257] x 100
Subtract the new number by the original number
903 - 257 = 646
646 ÷ 257 = 2.5136186770428015
2.5136186770428015 x 100 = 251.36%