Question

This recipe makes 3 portions of potato soup.

Richard follows the recipe but wants to make 9 portions.
Complete the amounts of each ingredient that he needs.

Recipe: Serves 3
20 ml oil
30 g onions
400 g potatoes
450 ml milk

Answer 1

60 ml oil, 90 g onions, 1200 g potatoes, 1350 ml milk

Explanation:

What you need to do here is multiply all of these ingredients by 3, because the recipe serves 3 and he needs to serve 9, and 9/3 = 3. Therefore, he would have to triple the recipe.