Use the formula for the present value of an ordinary annuity

Use the formula for the present value of an ordinary annuity or the amortization formula to solve the following problem. PV=$5,000 i=0.01 PMT=$300 n=? round to nearest interger

P =Present value
P = PMT (1+i)^(-n)
=> 5000 = 300 ( 1+ 0.01)^(-n)
=> 50/3 = (1.01)^(-n)
=>log (50/3) = (-n) log(1.01)
=> 1.2218 = (-n) * 0.0043
=> |n| = 1.2218/0.0043 = 284.14 Answer