Convert 3 7/8 into an improper fraction.

To convert the mixed number 3 7/8 into an improper fraction, we need to multiply the whole number (3) by the denominator of the fraction (8), and then add the numerator (7). Finally, we place the result over the original denominator.

3 × 8 = 24,

so our answer is 24.

24 + 7 = 31.

Therefore, the improper fraction form of 3 7/8 is 31/8.