Butter Chicken Chunky Soup, 94% fat free

I have a can of Butter Chicken Chunky Soup, which says on the front, "94% fat free". So what does that mean then?

Looking at the amounts of nutrients on the back, it has:

avg quantity per 100g
energy 310kJ
protein 3.1g
fat 5.2g
carbohydrate 7.3g

Using 17kJ/gram for protein and carbohydrate, and 37kJ/gram for fat, the calculation is:

energy = protein + carbos + fat
energy = 3.1 * 17 + 7.3 * 17 + 5.2 * 37
= 52.7 + 124.1 + 192.4
= 369.2 kJ

So 52.1% of the energy in the butter chicken chunky soup comes from fat. They call it "94% fat free". Yes I suppose water is fat free.

It has ingredients, which include "Chicken (4.0%)" and "Butter (1.0%)". They may as well have called it "95% butter chicken free".