Answer:
8%
Explanation:
This type of annuity is an Ordinary annuity; cashflows occur at the end of each year. Even though not mentioned, we assume it's the default scenario. Annuity Due on the other hand has cashflows that occur at the beginning of each year.
Since this is an annuity problem, you can use a financial calculator to find the interest rate(I) of the annuity.
Use the following inputs;
Duration;N = 20
Present value ; PV = -219000
Recurring annual payments; PMT = 22300
One time future value cashflow; FV = 0 (use 0 if not given)
then compute the interest rate ; CPT I/Y = 7.997% or 8%