97.2% is the change from 250 to 493
Calculation steps:
[( 493 - 250 ) ÷ 250] x 100 = 97.2%
Formula
Percentage change = [(493 - 250) / 250] x 100
Subtract the new number by the original number
493 - 250 = 243
243 ÷ 250 = 0.972
0.972 x 100 = 97.2%
Example