Plain white cards ( you could use index cards/recipe cards) with the following fractions:

0/2, 1/2, 2/2
0/3, 1/3, 2/3, 3/3
0/4, 1/4, 2/4, 34, 4/4
0/6, 1/6, 2/6, 3/6, 4/6, 5/6, 6/6
0/12, 1/12, 2/12, 3/12, 4/12, 5/12, 6/12, 7/12, 8/12, 9/12, 10/12, 11/12, 12/12

2 of each fraction card

You roll two dice and get a fraction. Ex: 4 and 5 gives you 4/5.

Player A gets a point if the fraction is in lowest terms. (like 4/5)
Player B gets a point if it isn't. (like 4/6)
Play until someone has 10 points.

You get one card turned over and one turned up.
You can pass or be "hit".
Your goal is to be closest to a total of two (whole number) without going over.