tolong dijawab ya kk

3.
[tex] \frac{3 }{3 + 5} = \frac{3}{8} [/tex]
4.
[tex] \frac{25}{10} \div \frac{5}{8} = \frac{25}{10} \times \frac{8}{5} = \frac{200}{50} \div 50 = 4[/tex]
5. ???