If two or more fractions have different denominators, it is possible to write them with a common denominator. As an example, consider 13\frac{1}{3}31 and 12\frac{1}{2}21 . 1⋅23⋅2=26and1⋅32⋅3=36 \dfrac{1\cdot2}{3\cdot2}=\dfrac{2}{6}\qquad\text{and}\qquad\dfrac{1\cdot3}{2\cdot3}=\dfrac{3}{6} 3⋅21⋅2=62and2⋅31⋅3=63