Question

What is 9 and 7 twelves minis 6 and 7 twelves,?

Answer 1

Step-by-step explanation:

Step 1

We can't subtract two fractions with different denominators. So you need to get a common denominator. To do this, you'll multiply the denominators times each other... but the numerators have to change, too. They get multiplied by the other term's denominator.

So we multiply 6 by 12, and get 72.

Then we multiply 7 by 9, and get 63.

Next we give both terms new denominators -- 9 × 12 = 108.

So now our fractions look like this:

72

108

−

63

108

Step 2

Since our denominators match, we can subtract the numerators.

72 − 63 = 9

So the answer is:

9

108

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