. . . . . . . . % of Nitrogen is present in CAN.

25% of Nitrogen is present in CAN.
CAN is a solid nitrate-based fertilizer, usually applied on acidic soils. It is obtained by the combination of Ammonium Nitrate solution with a source of calcium (limestone). CAN has a 25 to 28% Nitrogen content.
CAN is a nitrogen fertilizer that contains equal parts of fast-acting nitrate-nitrogen and longer-lasting ammonium-nitrogen. This ensures a more continuous nitrogen supply to the crop and thus better efficiency of use and also makes it suitable for unseasonal application during summer or winter.