Answer: increase by $80 million, and the maximum money-lending potential of the commercial banking system will increase by $400 million
Explanation:
Based on the information given in the question, the money multiplier will be calculated thus:
Money multiplier = 1/Required reserve ratio
where,
Required reserve ratio = 20%
Money Multiplier will now be:
= 1/0.20
= 5
Therefore, the maximum money-lending potential will be:
= $80 million × 5
= $400 million
Therefore, the money supply will by $80 million, and the maximum money-lending potential of the commercial banking system will increase by $400 million