frazioni

(7/(7*5))*(5/(3*7))*(7*2/3) = 2/9

$\frac{7}{35}×\frac{5}{21}×\frac{14}{3}$

semplifichiamo un passo per volta:

$\frac{1}{5}×\frac{5}{21}×\frac{14}{3}$

$\frac{1}{1}×\frac{1}{21}×\frac{14}{3}$

$\frac{1}{3}×\frac{2}{3}$

$\frac{2}{9}$.

7/35 * 5/21 = 7/7 *1/21 = 1/21

1/21 * 14/3 = 2/9