Вычислите: 3/5 : 2/15; 6/5 : 4/11; 12/5 : 15/2; 15/4 : 3/7; 21/2 : 3/5.

1. \(\frac35:\frac2{15}=\frac35\cdot\frac{15}{2}=\frac92\)
2. \(\frac65:\frac4{11}=\frac65\cdot\frac{11}{4}=\frac{33}{10}\)
3. \(\frac{12}{5}:\frac{15}{2}=\frac{12}{5}\cdot\frac2{15}=\frac8{25}\)
4. \(\frac{15}{4}:\frac37=\frac{15}{4}\cdot\frac73=\frac{35}{4}\)
5. \(\frac{21}{2}:\frac35=\frac{21}{2}\cdot\frac53=\frac{35}{2}\)

Ответ: 9/2; 33/10; 8/25; 35/4; 35/2.