Write 4 3/7 as an improper fraction

1. Convert the whole number 4 into a fraction with the same denominator as the fractional part:
4 = \frac{28}{7}

2. Add the fractional part 3/7 to the converted whole number:
\frac{28}{7} + \frac{3}{7} = \frac{31}{7}

Therefore,
\frac{31}{7}