Depends on whether or not you want to do it in mixed fraction or an improper fraction. When you simplify numbers you try to find the GCF or the greatest common factor that goes into the numbers except one. Here are the factors of both numbers.
14 - 1, 2, 7, 14
3 - 1, 3
There are no common factor. Therefore, it is impossible to simplify. We are not using decimals or fractions of numbers.
So if you simplify regularly without the mixed number, you get
But if you simplify into a mixed number, you get