Sum of two fractions

image

image

\(\frac{1}{5}+\frac{2}{3}=?\)
\(\frac{7}{15}\)
\(\frac{2}{15}\)
\(\frac{13}{15}\)
\(\frac{11}{15}\)
\(\frac{4}{15}\)

Calculator
Hint \(\frac{1}{5}+\frac{2}{3}\)
\(=\frac{1\times{3}}{5\times{3}}+\frac{2\times{5}}{3\times{5}}\)
\(=\frac{3}{15}+\frac{10}{15}\)
\(=\frac{3+10}{15}\)
\(=\frac{13}{15}\)
arrowf1