Subtraction of fractions with different (and unrelated) denominators

To subtract fractions with different denominators we first convert to equivalent fractions with the same denominator.

\begin{align}\frac{3}{4} − \frac{2}{3} &= \frac{9}{12} − \frac{8}{12} \text{(convert to equivalent fraction with the same denominator)} \\&= \frac{1}{12}\end{align}