Verified answer

Ответ:

[tex]\frac{2}{5} *\frac{16}{30} =\frac{2*16}{5*30} =\frac{32}{150} =\frac{16}{75}[/tex]

[tex]\frac{8}{18} *\frac{21}{3} =\frac{8*21}{18*3} =\frac{168}{54} =\frac{28}{9} =3\frac{1}{9}[/tex]