Say I want to settle a debt of 0.22p.....
0.22 of a penny is £0.0022.
You can't pay someone a fraction of a penny. Debts that involve fractions of the smallest currency are usually rounded to full multiples of the smallest unit. E. g. if your phone company charges 1.79 ct. for a one-minute call, it would be rounded to 2.00 cents.
Don't be so absurd. Why would you interpret 0.22p in such a way? Perhaps if I expressed it as £0.22p you would understand me?
I guess I'm never going to get the answer to my question...