chart
ingredients
proteins------------4 gram per cal
carb----------------4 gram per cal
fat------------------9 gram per cal
A banana has 27 grams of carb. it has a total of 121 calories. How many of its calories come from sources other than carbs?
27g / 4g/cal = 6.75 Cal. of carbs.
121 - 6.75 = 114.25 Cal. from other sources.