To convert the improper fraction 31/8 into a mixed number, you first divide the numerator (31) by the denominator (8).
When you do this division, 31 divided by 8 is 3 with a remainder of 7. This means that 31 can be expressed as:
31/8 = 3 7/8
In this mixed number, 3 is the whole number part, and the fraction part 7/8 is what remains after dividing. So, the mixed number representation of 31/8 is 3 7/8.