\(\frac{13}{27}=\frac{3}{27}+\frac{9}{27}+\frac{1}{27}=\frac{1}{9}+\frac{1}{3}+\frac{1}{27}\)
\(\frac{11}{16}=\frac{1}{16}+\frac{2}{16}+\frac{8}{16}=\frac{1}{16}+\frac{1}{8}+\frac{1}{2}\)
\(\frac{2}{3}=\frac{4}{6}=\frac{1}{6}+\frac{3}{6}=\frac{1}{6}+\frac{1}{2}\)
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