va rog muultttt e urgent

Răspuns:
[tex]( \frac{3}{4} - \frac{1}{2} ) \div \frac{3}{8} = \frac{3}{4} ^{1} - \frac{1}{2} ^{2} = \frac{3 - 2}{4} = \frac{1}{4} \\ \frac{1}{4 } \times \frac{8}{3} = \frac{8}{12} = \frac{2}{3} [/tex]