Can you please help me solving the problem?

Question

The product of 5 and p is equal to the quotient of q and 2. How to do it?

Answer 1

5p=q/2, so 10p=q or q=10p.

This means that, if p=1, q=10; if p=2, q=20, and so on. It also means, if p=½, q=5. So when we know p we can find q; and when we know q we can find p.