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...
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
when you see a problem like 12/5 and 0.48 what is the percentage you can find the percentage by looking at the numbers such as 0.48 you can turn this into a fraction which is 48/100 if you simplify...