Sum of two fractions

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\(\frac{5}{7}+\frac{4}{9}=?\)
\(1\frac{1}{63}\)
\(1\frac{4}{63}\)
\(1\frac{10}{63}\)
\(1\frac{6}{63}\)
\(1\frac{8}{63}\)

Calculator
Hint \(\frac{5}{7}+\frac{4}{9}\)
\(=\frac{5\times{9}}{7\times{9}}+\frac{4\times{7}}{9\times{7}}\)
\(=\frac{45}{63}+\frac{28}{63}\)
\(=\frac{45+28}{63}\)
\(=\frac{73}{63}\)
\(=\frac{63+10}{63}\)
\(=1+\frac{10}{63}\)
\(=1\frac{10}{63}\)
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