Answer:
I'm not sure if this is what you meant but if it's not, put a picture of the equation and I'll edit my answer

Explanation:
Assuming the equation is:

The first thing you have to do is simplify:
2 * 67 = 134

Multiply the numerators:
3 * 7 = 21
Then multiply the denominators:
5 * 134 = 670
Then simplify again:
