a)
\frac{\frac{1}{3}*\frac{4}{5}}{4}
b)
\frac{1\frac{1}{5}}{\frac{4}{5}:\frac{2}{3}}
c)
\frac{1\frac{1}{2}*\frac{2}{7}}{2\frac{1}{4}*\frac{1}{3}}=
d)
\frac{\frac{2}{5}:2\frac{1}{2}}{\frac{3}{7}*1\frac{1}{6}}=\frac{\frac{2}{5}:\frac{5}{2}}{\frac{\not3^1}{\not7^1}*\frac{\not7^1}{\not6^2}}=\frac{\frac{2}{5}*\frac{2}{5}}{\frac{1}{2}}=\frac{\frac{4}{25}}{\frac{1}{2}}=\frac{4}{25}*\frac{2}{1}=\frac{8}{25}=0,32
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