Question

15/17 : 5=
4: 20/ 21=
8 3/4 : 2 1/3

Answer 1

$frac{15}{17}:5= frac{15}{17}* frac{1}{5} = frac{3}{17}; \ 4: frac{20}{21}= 4 *frac{21}{20}= frac{21}{5}=4,2; \ 8 frac{3}{4} : 2 frac{1}{3}= frac{35}{4}: frac{7}{3}= frac{35}{4}* frac{3}{7}= \= frac{15}{4}=3,75$