Akira, I'm a registered dietitian so maybe I can help a bit. The general population recommendations are something like 55% carbs, 15% protein and 30% fat.
Plain and simple, your body wants to use carbs for energy. They are your bodies preferred fuel source. It will pretty much use up all your carbs first then switch to using fat and/or protein for energy.
That being said, for the exercising/weight lifting population, your protein requirements increase. I would suggest a nutrient ratio of 50% carbs, 25% protein and 25% fat. Focus on hitting your fat and protein goals. Both fat and protein (as well as fiber) are broken down slower than carbs and give you a feeling of satiety (feeling full) for a longer period of time. Try this and see how it works out for you. Feel free to
PM me if you have any questions. Take care, Greg
