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A recipe for 5 people uses 70 g of margarine. How much margarine is needed to make the same recipe for 15 people? Give your answer in grams (g).

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Final answer:

To find out how much margarine is needed for 15 people when a recipe requires 70 g for 5 people, we can use a ratio and proportion method leading to the solution of 1050 grams of margarine.

Step-by-step explanation:

The question involves a simple proportion to determine how much margarine is needed to scale up a recipe for 5 people using 70 g of margarine to a recipe for 15 people. If 70 g of margarine is required for 5 people, we can set up a ratio to find out the amount needed for 15 people. We can write this as 70 g margarine / 5 people = x g margarine / 15 people.

To solve for x (the amount of margarine for 15 people), we cross multiply and divide as follows:

5 people * x g margarine = 70 g margarine * 15 people

x = (70 g * 15) / 5

x = 1050 g

Therefore, 1050 grams of margarine is needed to make the same recipe for 15 people.

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