Wyznaczamy liczby półtora razy mniejsze od podanych liczb. 

$\frac{2}{3}:1\frac{1}{2}=\frac{2}{3}:\frac{3}{2}=\frac{2}{3}\cdot \frac{2}{3}=\frac{4}{9}$  

$1\frac{1}{4}:1\frac{1}{2}=\frac{5}{4}:\frac{3}{2}=\frac{5}{{\sout{4}}^2}\cdot \frac{{\sout{2}}^1}{3}=\frac{5}{2}\cdot \frac{1}{3}=\frac{5}{6}$  

$2\frac{2}{5}:1\frac{1}{2}=\frac{12}{5}:\frac{3}{2}=\frac{{\sout{12}}^4}{5}\cdot \frac{2}{{\sout{3}}^1}=\frac{4}{5}\cdot 2=\frac{8}{5}=1\frac{3}{5}$  

$3\frac{1}{8}:1\frac{1}{2}=\frac{25}{8}:\frac{3}{2}=\frac{25}{{\sout{8}}^4}\cdot \frac{{\sout{2}}^1}{3}=\frac{25}{4}\cdot \frac{1}{3}=\frac{25}{12}=2\frac{1}{12}$  

$5\frac{5}{6}:1\frac{1}{2}=\frac{35}{6}:\frac{3}{2}=\frac{35}{{\sout{6}}^3}\cdot \frac{{\sout{2}}^1}{3}=\frac{35}{3}\cdot \frac{1}{3}=\frac{35}{9}=3\frac{8}{9}$