Questions: 2 2/5 - 13/20 =

2 2/5 - 13/20 =
Transcript text: $2 \frac{2}{5}-\frac{13}{20}=$
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Solution

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Solution Steps

To solve the given expression \(2 \frac{2}{5} - \frac{13}{20}\), we need to first convert the mixed number \(2 \frac{2}{5}\) into an improper fraction. Then, we find a common denominator for the fractions and perform the subtraction.

Step 1: 混合数の変換

混合数 \(2 \frac{2}{5}\) を不適切な分数に変換します。
\[ 2 \frac{2}{5} = 2 + \frac{2}{5} = \frac{10}{5} + \frac{2}{5} = \frac{12}{5} \]

Step 2: 分数の引き算

次に、引き算を行います。
\[ \frac{12}{5} - \frac{13}{20} \] このために、共通の分母を見つけます。分母の最小公倍数は20です。
\[ \frac{12}{5} = \frac{12 \times 4}{5 \times 4} = \frac{48}{20} \] したがって、引き算は次のようになります。
\[ \frac{48}{20} - \frac{13}{20} = \frac{48 - 13}{20} = \frac{35}{20} \]

Step 3: 約分

最後に、分数を約分します。
\[ \frac{35}{20} = \frac{7}{4} \]

Final Answer

\(\boxed{\frac{7}{4}}\)

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