V = Vp(1+r)^n. APR = 10%.
r = (10%/12) / 100% = 0.00833=Monthly %
rate expressed as a decimal.
n = 1Comp./mo * 60mo = 60 Compounding
periods.
V = Vp(1.00833)^60 = $100
Vp = 100 / (1.00833)^60 = $60.77.
Often in personal finance we want to know what our $1 investment today will be worth in 20 years. In business however, there is more concern with answering the question, “If I receive $100 in 5 years, what is that worth today?” To answer this question, modify the formula fv = pv*((1+i)^n) and use the reciprocal. Simply stated, the reciprocal of a number is 1 divided by the number; the reciprocal of 10, for example, is 1/10. In the formula above, we divide both sides by ((1+i)^n), which creates a new formula where the fv is multiplied by the reciprocal of the original: fv*(1/((1+i)^n))=pv. Select an interest rate and number of periods—be sure your numbers are different from other students who already answered this question—to calculate the present value of $100 received in the future. What would the value of $100 in the future be today given the interest rate and number of periods you selected?
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