Hello to anyone who can help with my question...

I have been FitDay to trak my intake of carbs/fiber/prot etc....and when I look at the totals and I have 20 grams of carbs and 5 grams of fiber, is my net grams to be 15? Next question -is there a percent I should aim for as far as a fat/prot ratio goes - I have been averaging about 70-75 % fat and 20-30% protein, with the remainder being carbs.

Thanks to anyone who can help.