The reserve ratio requirement must be 7%
Reserves= deposits-loans
= 500-455
= 45 million
Required reserve= reserve- excess reserve
= 45-10
= 35 million
Required reserve ratio= required reserve/deposits
= 35/500
= 0.07
= 7%
Required reserve ratio- A required reserve ratio is the percentage of deposits that a bank is required by regulators to hold in reserves and not lend out. If the required reserve ratio is one to ten, a bank must keep $0.10 of every dollar in reserves but can lend out $0.90 of every dollar.
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