The marginal propensity to save is defined as:.
a) saving divided by disposable income.
b) disposable income divided by saving.
c) the change in saving divided by the change in disposable income.
d) the change in disposable income divided by the change in saving.

c) the change in saving divided by the change in disposable income.

Explanation:

Marginal Propensity to Save (MPS) is defined as the proportion of the aggregate increase in income that is saved by a consumer rather than spent. MPS is in contrast to marginal propensity to consume (MPC) which is the proportion of aggregate increase in income that is consumed.

MPS is calculated as the change in savings divided by the change in income.

That is,

MPS=∆S/∆Y

Where,

∆S= change in savings

∆Y= Change in income

Marginal propensity to save changes with income level. The higher the income level; the higher the MPS, the lower the income level; the lower the MPS.

you will have $2593.74 in 10 years if you set aside $1,000 at 10%

you will have $9321.91 in 20 years if you set aside $2000 at 8%

you will have $1469.32 in 5 years if you set aside $1000 at 8%

you will have $1296.87 in 10 years if you set aside $500 at 10%

you will have $239.66 in 15 years if you set aside $100 at 6%

you will have $4660.96 in 20 years if you set aside $1000 at 8%