Question

how do you find a counterexample to show that the conjecture is false

Answer 1

Welcome to Open Study.

Answer 2

It depends on the conjecture. You would find a case where the conjecture fails. If it is not possible to find a counter example, demonstrate why it is not possible.

Answer 3

Hints:
1) What happens when you multiply a number by another positive number less than 1?

2) Make the denominators of the two proper fractions large enough so that you can make the numerators whatever you want.