Express each of the following as fractions: $12.4$

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Solution

$\begin{array}{rcl} 12.4 & = & 12 + 4 tenths \\ = & 12 + \frac{4}{10} \\ = & \frac{12 + 4}{10} [Taking L . C . M of denominators i . e . 10] \\ = & \frac{16}{10} \end{array}$
Hence, $12.4$ can be expressed as $\frac{16}{10}$ .

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