91.83% is the change from 257 to 493
Calculation steps:
[( 493 - 257 ) ÷ 257] x 100 = 91.83%
Formula
Percentage change = [(493 - 257) / 257] x 100
Subtract the new number by the original number
493 - 257 = 236
236 ÷ 257 = 0.9182879377431906
0.9182879377431906 x 100 = 91.83%