90.27% is the change from 257 to 489
Calculation steps:
[( 489 - 257 ) ÷ 257] x 100 = 90.27%
Formula
Percentage change = [(489 - 257) / 257] x 100
Subtract the new number by the original number
489 - 257 = 232
232 ÷ 257 = 0.9027237354085603
0.9027237354085603 x 100 = 90.27%