You have to add 1/6 and 1/4. The only way to do that is to find a common denominator. The lowest number that both 6 and 4 go into is 12:
[tex] \frac{1}{6} + \frac{1}{4} [/tex]
You have to multiply the 6 by 2 to get to 12, so you have to multiply the 1 by 2 to get the equivalent fraction of 2/12. Do the same with the 1/4: you have to multiply 4 by 3 to get to 12, so you have to multiply the 1 by 3 to get to the equivalent fraction of 3/12.
[tex] \frac{2}{12} + \frac{3}{12}= \frac{5}{12} [/tex]
