Question 1131064
P=rPV/(1-(1+r)^(-nt)), where r is rate/year (n) and t is number of years
P=(.09/12)*22500/(1-(1.0075^300)
=168.75/0.8937
=$188.82
Total amount paid is the above *300 months, or $56646
the principal was $22500, so the percentage paid towards it is 39.7%