It is recommended that 3/5 of the calories a person consumes come from carbohydrates. If 1/12 of these calories should be from fiber, what fraction of the number of calories should come from fiber?

3/5 * 1/12 = 1/20

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To find the fraction of calories that come from fiber, we need to find the fraction of calories out of the total calories that should come from fiber.

First, let's determine the fraction of calories that should come from carbohydrates. It is recommended that 3/5 or 3 out of 5 parts of the calories a person consumes come from carbohydrates. This means that the fraction of calories from carbohydrates is 3/5.

Next, we need to find the fraction of calories from fiber out of the total calories from carbohydrates. It is given that 1/12 of these calories should come from fiber. To find this fraction, we can divide 1 by 12: 1/12.

Finally, we multiply the fraction of calories from carbohydrates (3/5) by the fraction of calories from fiber (1/12) to get the fraction of calories that should come from fiber out of the total calories:

(3/5) * (1/12) = 3/60 = 1/20.

Therefore, 1/20 of the number of calories should come from fiber.