для цього треба просто помножити

[tex]28 \times \frac{1}{2} = \frac{28 \times 1}{2} = 14[/tex]

[tex]28 \times \frac{5}{6} = \frac{28 \times 5}{6} = \frac{140}{6} = 23.333333333 [/tex]

[tex]28 \times \frac{5}{12} = \frac{28 \times 5}{12} = \frac{7 \times 5}{3} = \frac{35}{3} = 11.6666666666[/tex]

[tex]28 \times \frac{11}{18} = \frac{28 \times 11}{18} = \frac{14 \times 11}{9} = \frac{154}{9} = 17.111111111[/tex]