253.7% is the change from 257 to 909
Calculation steps:
[( 909 - 257 ) ÷ 257] x 100 = 253.7%
Formula
Percentage change = [(909 - 257) / 257] x 100
Subtract the new number by the original number
909 - 257 = 652
652 ÷ 257 = 2.536964980544747
2.536964980544747 x 100 = 253.7%