299.2% is the change from 250 to 998
Calculation steps:
[( 998 - 250 ) ÷ 250] x 100 = 299.2%
Formula
Percentage change = [(998 - 250) / 250] x 100
Subtract the new number by the original number
998 - 250 = 748
748 ÷ 250 = 2.992
2.992 x 100 = 299.2%
Example