An easier way to do this is to make the fractions improper fractions. 3 1/6 can be rewritten as 19/6. 1 4/6 can be rewritten as 10/6. (Multiply the denominator by the number at its side, and add it to the numerator). 2 3/6 is 15/6. Subtract 10/6 from 19/6. 19/6-10/6=9/6. 9/6 is not 15/6, therefore she did not use 2 3/6 yards of fabric.
