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@Nef
48-16 gives 1
46-16 gives 8, I think you might've just put the numbers in wrong.
the easiest way to do it is the simplification rule where you treat it as a fraction and the smallest number you get the cog size = the amount of skid patches.
ie -
46/16 = 23/8, giving 8 skid patches.
48/16 = 3/1, giving 1 patch.