tolong bantuin jawab dong dan pake caranya

[tex]a) \frac{8}{4} \\ = \frac{8 \times 25}{4 \times 25} \\ = \frac{200}{100} \\ = 200\% \\ b) \frac{9}{25} \\ = \frac{9 \times 4}{25 \times 4} \\ = \frac{36}{100} \\ = 36\%[/tex]