27 1980-220000= total interest 5 1980.
5 1980/36= monthly interest 1443.9
7555- 1443.9= monthly principal 611.1.
1443.9/220000= monthly interest rate 0.0065(6.5%)
6.5* 12= annual interest rate of 0.078 (about 7%)
This is bank interest, which is very low.