Question

1213/30÷213/10 Помогите плжайлуйста​

Answer 1

$\frac{1213}{30} \div \frac{213}{10} = \frac{1213}{30} \times \frac{10}{213} = \frac{1213}{3} \times \frac{1}{213} = \frac{1213}{639} = 1 \times \frac{574}{639}$