Question

3a/5b=2/3 b/a=?

Dau coroana!!

Answer 1

$\frac{3a}{5b} = \frac{2}{3}$

$\frac{3}{5} \times \frac{a}{b} = \frac{2}{3}$

$\frac{a}{b} = \frac{2}{3} \div \frac{3}{5}$

$\frac{a}{b} = \frac{2}{3} \times \frac{5}{3}$

$\frac{a}{b} = \frac{2 \times 5}{3 \times 3}$

$\frac{a}{b} = \frac{10}{9}$

${(\frac{a}{b})}^{-1}=\frac{b}{a}=\frac{9}{10}$

Answer 2

a/b=10/9 ⇒
b/a=9/10
------------------