Ratio of Annual Debt Service to original principal of the loan. Also known as a mortgageconstant.
原贷款本金每年的借债服务比率。亦称房屋贷款常数。
2
Your mortgage payment is constant through time but the fraction of it that goes to paying off principal versus interest changes through time and it just changes as dictated by this formula.
抵押贷款每月还款是固定的,但是其中本金和利息的比例关系,会随时间而改变,这是由这个公式所决定的
3
Whereas, at the beginning, the mortgage balance is dropping only very slowly because you've got a lot of interest to pay and your mortgage payment is constant.