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Subtract. $\newline$ $\frac{9}{10} - \frac{2}{5} =$ _____

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Add and subtract fractions

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Q. Subtract.

\newline

\frac{9}{10} - \frac{2}{5} =

_____

Convert fractions: Convert fractions to have a common denominator. $\newline$ $\frac{9}{10}$ and $\frac{2}{5}$ need the same denominator to subtract easily. The least common denominator between $10$ and $5$ is $10$ . $\newline$ $\frac{9}{10}$ stays as $\frac{9}{10}$ . $\newline$ $\frac{2}{5}$ converts to $\frac{4}{10}$ (because $2 \times 2 = 4$ and $\frac{2}{5}$ $0$ ).
Subtract fractions: Subtract the fractions. $\newline$ Now that both fractions have the same denominator, subtract the numerators. $\newline$ $\frac{9}{10} - \frac{4}{10} = \frac{5}{10}$ .
Simplify result: Simplify the result. $\frac{5}{10}$ can be simplified to $\frac{1}{2}$ by dividing both the numerator and the denominator by $5$ .

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