Answer: 0.70; 0.30
Step-by-step explanation:
Marginal propensity to consume(MPC) is the additional spending by an economic agent due to a rise in income while the marginal propensity to save is the additional saving by someone due to rise in income.
Increase in income = $3,000
Increase in spending = $2,100
Increase in savings = $3,000 - $2,100 = $900
MPC = $2,100/$3,000
= 0.70
MPS = $900/$3,000
= 0.30