Overdraft Repayment Query

Hi,
I Currently have an overdraft facility of 1000 euro that i want to get rid of by end of the year.
Am I correct in thinking that if i stay under my overdraft by at least 100 euro every month for the next 10 months, that my overdraft will be cleared & fully repaid?
Sorry if seems like a foolish question, just not great at these things!!!!

yes, spend 100 less per month for 10 months and it will be cleared.

Just wanted to be certain, much appreciated.