The dri committee recommended a diet that contains % of its calories from carbohydrate

In a normal diet the 50-55% of the total calories should come from carbohydrates

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass