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EXAMPLE 4.90

	\(5 \dfrac{3}{5}-2 \dfrac{4}{5}\)
Rewrite the problem in vertical form.	\[ \begin{array}{r} 5 \dfrac{3}{5} \\ -2 \dfrac{4}{5} \\ \hline \end{array} \]
Since \(\dfrac{3}{5}\) is less than \(\dfrac{4}{5}\), take \(1\) from the 5 and add it to the \(\dfrac{3}{5}:\left(\dfrac{5}{5}+\dfrac{3}{5}=\dfrac{8}{5}\right)\)	\[ \begin{array}{rr} 5 \dfrac{3}{5} & \longrightarrow 4 \dfrac{8}{5} \\ -2 \dfrac{4}{5} & -2 \dfrac{4}{5} \\ \text{____} & \text{____} \end{array} \]
Subtract the fractions.	\[ \begin{array}{r} 4 \dfrac{8}{5} \\ -2 \dfrac{4}{5} \\ \hline \dfrac{4}{5} \end{array} \]
Subtract the whole parts. The result is in simplest form.	\[ \begin{array}{r} 4 \dfrac{8}{5} \\ -2 \dfrac{4}{5} \\ \hline 2 \dfrac{4}{5} \end{array} \]

Since the problem was given with mixed numbers, we leave the result as mixed numbers.

EXAMPLE 4.91

	\(9 \dfrac{6}{11}-7 \dfrac{10}{11}\)
Rewrite as improper fractions.	\(\dfrac{105}{11}-\dfrac{87}{11}\)
Subtract the numerators.	\(\dfrac{18}{11}\)
Rewrite as a mixed number.	\(1 \dfrac{7}{11}\)

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