Chips / Potatoes - why the difference?

I am sure that this was mentioned during my DAFNE course but for the life of me, I cannot remember the answer but ....

In the "DAFNE Carbohydrate Portion" book/bible, page 35 35g of chips are shown as having a value of 1 CP. Quick flip to page 50 and we read that 1CP equals 60g of boiled potato. How is that then?

If anything, I would have thought that on a weight for weight comparison there would be more carb in a boiled potato compared to chips which when weighed out are covered in oil. However, it seems that chips are not far off twice as carby as plain old potatoes. (Just noticed - same information on one page - p24).

Thank you,
Alan

Chip weight is carbohydrate with very little water.
Boiled weight is carbohydrate with much higher water content.
Hence carbohydrate density of chips - for want of a better term - is much higher.
Regards Garry

Thanks Garry - Makes sense.

Alan