Subtract  7 5/6
               - 3 1/4   (Common denominators for 6 and 4 are 12, 24, 36, etc.)
                             (We will use 12 since it is the least common denominator (LCD))

               7 5/6  =     7 10/12
             - 3 1/4  =   - 3   3/12
                                 4  7/12    Did you get the right answer? If not, show the
                                                teacher your work and ask questions. What happens
                                                if you use 24 as the common denominator? Try it.
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