\(\frac{1}{2}:\frac{1}{3}:\frac{1}{5}=\frac{1}{2}\cdot\frac{3}{1}:\frac{1}{5}=\frac{3}{2}:\frac{1}{5}=\frac{3}{2}\cdot\frac{5}{1}=\frac{15}{2}\)
Kick mik nha !!!!!!!!!!!!!!
\(\frac{1}{2}:\frac{1}{3}:\frac{1}{5}=\frac{15}{30}:\frac{10}{30}:\frac{6}{30}=\frac{15}{2}\)