Задание 8

$$\frac{11}{4}-\frac{2}{5}=$$$$\frac{11\cdot 5}{4\cdot 5}-\frac{2\cdot 4}{5\cdot 4}=$$$$\frac{55}{20}-\frac{8}{20}=$$$$\frac{55-8}{20}=\frac{47}{20}=2,35$$