As fractions are numbers you would use the same methods as any other comparison or ordering of numbers. Largest to smallest or smallest to largest are the most likely ways
You can use the same notation and ordering for fractions as you do integers. The difficulty with fractions is that in most cases you need to find eqivalent denominators to see how they rank.
Ie. If...
One way is to write equivalent fractions with like denominators. IF your ordering fractions AND decimals, write the decimal(s) as fractions. Then put them side by side and compare. for example. Lets...