When the IRS works out tax due it uses a basic formula related to earnings.
In this case we first divide 11468 by 48800 to get a fraction. We can divide these numbers by common factors to make the fraction less cumbersome;
11468/48800=2867/12200 (÷4)=47/200 (÷61). To get percentage, multiply by 100:
47/200*100=47/2=23.5%.