Find the numerator of the equivalent fraction with denominator 12.

If y/x is your fraction, then whatever you have to multiply the denominator  'x' by to get twelve, you should also multiply 'y' by in the numerator to get your equivalent fraction.

Find the numerator of the equivalent fraction with denominator 12.

I don't quite understand what you want: So, here is my attempt: 1/12=2/24=4/48=8/96........etc.