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Hope this helps! :-)
Answer: Yes I do think it is wise
Explanation:
I think it is wise to address obesity in children because you can easily prevent obesity in children and help the people down the road if you just feed them healthy from the start. Feeding children sugary sweets is very easy and is cheaper than buying all organic and all natural food, but if you don't feed your child sugar from the start then they won't get used to eating bad stuff for them. They will be used to eating good foods and are least likely to start eating bad food and will most likely not be obese.
A 12 year old male should have a caloric intake between 1800-2400 calories per day. Thus, your percentage would be based on that days specific caloric intake.
Using 2000 as a average, the 900 calorie burger would be 45% of your daily calories.