The chart is it important to get all the goal percentages? I uploaded today's chart to my photos and i am quite far off today for the carbohydrates but I have my supper ready for later and know I won't want anything else to eat ?
The basic CDC and NIH percentages are 20 protein, 50 carb, 30 fat. Myfitnesspal uses those guidelines. If a person is trying to gain muscle they can of course adjust the protein percentage.
The reason it is set as default to these percentages is because those guidelines help a regular person take in enough micronutrients found in carbs such as vegetables, fruit, etc., enough fat to carry the fat-soluble vitamins, and enough protein to MAINTAIN muscle mass.
They use science-based research to set the percentages, and adjust the recommendations if new, SCIENTIFIC research indicates otherwise.