Explain how the present value of an ordinary annuity interest table is converted to the present value

Question:

Explain how the present value of an ordinary annuity interest table is converted to the present value of an annuity due interest table.

Annuity
An annuity is a series of equal payment made at equal intervals during a period of time. In other words annuity is a contract between insurer and insurance company in which insurer make a lump-sum payment or a series of payment and, in return,...