Answer:
The government will need to reduce spending by $60 billion
Step-by-step explanation:
Expansionary gap is defined as a situation where the total output of an economy exceeds its potential output. That is the economy is performing above its long term potential as measured by GDP.
When this occurs the government will need to reduce spending to match output with economic needs.
Marginal propensity to consume is the proportion of an individual's income that is reserved for consumption.
In this case it is 4/5. This means individuals are willing to spend 4/5 of their income on consumption
The amount needed by the economy to meet consumption is:
Amount consumed= (4/5) * 300 billion
Amount consumed= $240 billion
Therefore
Excess cash= 300 billion - 240 billion = $60 billion
The government will need to reduce spending by $60 billion