Hi Mitch,

Let's work up to this.

 ¹⁰/₂ = ?? That's easy, the answer is 5 since 2 × 5 = 10. This answer makes me think that I can ask the question in a different way. Instead of ¹⁰/₂ = ?? I am going to ask What do you multiply the denominator by to get the numerator? Said in symbols 2 × ?? = 10.

Try another

Again I want to ask What do you multiply the denominator by to get the numerator? or
2 × ?? = ²/₇ . Now you can see ?? = ¹/₇

And one more

Reworded it becomes ¹/₃ × ?? = 4 and hence ?? = 12.

Finally

Penny