251.75% is the change from 257 to 904
Calculation steps:
[( 904 - 257 ) ÷ 257] x 100 = 251.75%
Formula
Percentage change = [(904 - 257) / 257] x 100
Subtract the new number by the original number
904 - 257 = 647
647 ÷ 257 = 2.517509727626459
2.517509727626459 x 100 = 251.75%