Answer: 27/14
Step-by-step explanation: It's important to understand that dividing by a fraction means the same thing as multiplying by the reciprocal of that fraction. In other words, we can simply change the division symbol to multiplication and flip the second fraction.
So we can rewrite this problem as 3/7 · 9/2.
When multiplying two fractions together, we multiply across the numerators and we also multiply across the denominators.
So 3/7 · 9/2 is 27/14.