a bakery baked two type of cakes, chocolate cake and vanilla cake. Given 30% of the cakes are vanilla cakes and only half of the vanilla cakes was sold. State each of the following ratios in the form of a:b. Given the answers in simplest form.
(i) the ratio of the number of chocolate cakes to the number of vanilla cakes.
(ii) the ratio of the number of vanilla cakes sold to the total number of cakes