18 units of whatever the measure is
3/7, 3/5, 1/2 is the answer it starts from the lowest to the lagest
4/6 and (0,1) is the answers
For this case what you should do is follow the following steps:
1) factorize numerator and denominator of both expressions.
2) cancel similar terms
3) add both fractions by cross product
4) Rewrite the numerator and denominator.
Answer:
See attached image.