Why is the percentage of food eaten a good number to use? explain

To understand that you have to balance each food you intake in your body; Balancing your food is not only used to make you stay fit but it can enhance your mental and physical health.  Nutrition is vital for your body and all of its systems to function properly, by having good nutrition it will help you maintain a healthy weight, reduce body fat, provide your body with energy, promote good sleep and generally make you feel better. 

With the use of proper diet, you will go on to your everyday routine without feeling uncomfortable. Eating a diet rich in some vegetables and fruits as part of an overall healthy diet may protect against certain types of cancers. Diets rich in foods containing fiber, such as some vegetables and fruits, may reduce the risk of heart disease, obesity, and type-2 diabetes.