Econ problem answer?

Question

The Third National Bank has reserves of $20,000 and checkable deposits of $100,000. The reserve ratio is 20 percent. Households deposit $5000 in currency into the bank that is added to reserves. What level of excess reserves does the bank now have? The answer I got is $5000. Is this correct?

Answer 1

Bank will have 4'000 excess reserves. (5'000-20% =5'000-1'000). Or in percentage: Excess reserve will be 25'000/21'000 =1.190476 =+19.0476%