A document provides a homework assignment for teens on calculating carbohydrate intake from diets of varying calorie amounts. It explains that a typical diet gets 50-65% of its calories from carbohydrates. It gives an example of how to calculate that a 2200 calorie diet following this would provide 275 grams of carbohydrates. Students are then asked to calculate the grams of carbohydrates for diets of 1600, 1800, 2200, and 2600 calories using the same method shown in the example.