In an open economy, a government injection of £8 billion results in a total increase in national income of £20 billion. If the marginal propensity to save (MPSMPSMPS) is 0.22 and the marginal rate of taxation (MRTMRTMRT) is 0.11, what is the marginal propensity to import (MPMMPMMPM)?
0.070.070.07
0.270.270.27
0.670.670.67
0.730.730.73
