Answer: You didn't put any fractions, so i'm guessing your asking how to order fractions least to greatest. You have to make all the denominators the same to see the value of each fraction. Once you see everything side by side you can put them in order from least to greatest.
Example: Lets say you have 1/2, 2/3, 5/12, and 3/4. A common denominator would be 12, because all the numbers are a factor of 12. To find 1/2 you would do 2 x 6= 12. Since you multiply by 6 to get 12 you multiply the 1 by 12 too. You would get 6/12. You just do the other fractions the same way and get: 1/2=6/12 2/3= 8/12 5/12 3/4=9/12. Then you just put them in order from least to greatest. 5/12, 1/2. 2/3, 3/4