Question
Evaluate: $\frac{5}{9}+\frac{3}{-4}$
✓
Answer
$\frac{5}{9}-\frac{3}{4}$
$(\text{LCM}$ of $9$ and $4=2 \times 2 \times 3 \times 3=36)$
$=\frac{5 \times 4}{9 \times 4}-\frac{3 \times 9}{4 \times 9}$
$ =\frac{20-27}{36}=\frac{-7}{36}$
$\text{(LCM}$ of $9$ and $4=36 )$
$=\frac{-7}{36}$
| $2$ | $9, 4$ |
| $2$ | $9, 2$ |
| $3$ | $9, 1$ |
| $3$ | $3, 1$ |
| $1,1$ |
$=\frac{5 \times 4}{9 \times 4}-\frac{3 \times 9}{4 \times 9}$
$ =\frac{20-27}{36}=\frac{-7}{36}$
$\text{(LCM}$ of $9$ and $4=36 )$
$=\frac{-7}{36}$
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