正解は8/12と3/12

$\displaystyle \frac{2}{3}\times\displaystyle \frac{4}{4}=\displaystyle \frac{8}{12}$

$\displaystyle \frac{1}{4}\times\displaystyle \frac{3}{3}=\displaystyle \frac{3}{12}$

分母を同じ数字にしよう！

もう1問！