Answer:
It allows banks to keep only a small percentage of their deposits in reserve.
Step-by-step explanation:
A fractional reserve system requires commercial banks to maintain only a percentage of their customer deposits at their custody at any time. It means that at any time, only a fraction of deposits will have physical cash backing. The commercial banks' regulator determines the fraction or percentage of deposits to be maintained.
The reserves maintained services to cater to regular and any abnormal withdrawals. Commercial banks usually loan out the other fraction to other customers. Reserves are also a monetary policy tool.