Oh, dear, I’m quite sure you’ve got that backwards.
Wiki: Fractional-reserve banking is the practice whereby a bank takes in deposits, creates credit or makes loans, and holds reserves (to satisfy demands for withdrawals) that are less than the amount of its customers’ deposits.
How's that?
Actually banks make loans that are a multiple of the deposits that they hold, rather than being less than their deposits.
Their reserves are only a fraction of what they loan out, ergo the name ‘fractional reserves’.