Present Value of An Annuity Formula

Equation for calculate present value of an annuity is,

$\mathrm{PVA}=\frac{A}{i}(1-\frac{1}{{(1+i)}^n})$

where,
PVA = Present value of An Annuity
A = The value of the individual payments in each compounding period
i = The discount rate, or the interest rate at which the amount will be compounded each period
n = The number of periods