To express 7 divided by 3 as a fraction, you write it as 7/3. This fraction indicates that you have 7 parts out of a total of 3 parts. In this case, 7 is the numerator (the number above the line), and 3 is the denominator (the number below the line).
Additionally, if you want to simplify or convert this fraction, you can also express it as a mixed number. Since 3 goes into 7 two whole times (which is 6), you would have a remainder of 1. Therefore, 7/3 can also be written as 2 1/3 when converted to a mixed number.