Answer:
1200g or 1.2 kg
Explanation:
We know that you need 400 grams of potatoes for 4 people to make a recipe and we want to find out how many for 12 people so
Method 1
First of all we would need to work out the amount needed for 1 person so,
400g = 4 people
? g = 1 person
4 ÷ 1 = 4
400 ÷ 4 = 100
So 100g is needed for one person using that information
1 person = 100g
12 people = ? g
1 × 12 = 12
100 × 12 = 1200 g
Method 2
We can see that we need 400g for 4 people and we want to find out the amount for 12 people so
400g = 4 people
?g = 12 people
12 ÷ 4 = 3
400 × 3 = 1200g
So you would 1200g or 1.2 kg of potatoes to make this recipe for 12 people