If 'S' is the amount available after 'n' interest periods for an initial principal 'P' with the discrete compound interest rate 'i', the present worth is given by

A $$\frac{{{{\left( {1 + {\text{i}}} \right)}^{\text{n}}}}}{{\text{S}}}$$
B $$\frac{{\text{S}}}{{{{\left( {1 + {\text{i}}} \right)}^{\text{n}}}}}$$
C $$\frac{{\text{S}}}{{\left( {1 + {\text{in}}} \right)}}$$
D $$\frac{{\text{S}}}{{{{\left( {1 + {\text{n}}} \right)}^{\text{i}}}}}$$

Correct Answer: $$\frac{{\text{S}}}{{{{\left( {1 + {\text{i}}} \right)}^{\text{n}}}}}$$

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