Sum of two fractions

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\(\frac{2}{5}+\frac{3}{4}=?\)
\(1\frac{3}{20}\)
\(1\frac{1}{20}\)
\(1\frac{7}{20}\)
\(1\frac{3}{10}\)
\(1\frac{9}{20}\)

Calculator
Hint \(\frac{2}{5}+\frac{3}{4}\)
\(=\frac{2\times{4}}{5\times{4}}+\frac{3\times{5}}{4\times{5}}\)
\(=\frac{8}{20}+\frac{15}{20}\)
\(=\frac{8+15}{20}\)
\(=\frac{23}{20}\)
\(=\frac{20+3}{20}\)
\(=1+\frac{3}{20}\)
\(=1\frac{3}{20}\)
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