The interest rate for more than five years is 6.8%, which decreases in equal amount, that is, the average capital pays the most in the first month and then decreases month by month. The reduced difference is the interest of one month's principal. The principle is just like its name. The average capital divides the principal (total loan amount) into n equal parts (total loan months). One principal plus interest on N principals in the first month, one principal plus interest on N- 1 principal in the second month, and so on, and one principal plus interest on this principal in the last month.

10 repayment plan: interest 6.8%

Total loan amount: 260,000 yuan, total repayment amount: 349 137 yuan, and interest paid: 89 137 yuan.

260000 divided by 120( 10 years, 120 months) = 2 166 yuan.

The annual interest rate is 6.8% and the monthly interest rate is 0.566667%.

The monthly interest of each principal is 265,438+067 multiplied by 0.566,667%, which is approximately equal to 65,438+02.50000.00000000606

So the money you need to pay back in the first month is 2167+12.27778x120 = 2167+1473, which finally equals 3640.

In the second month, it decreased by 12.78 yuan, decreasing month by month. . . . .

20-year loan plan: the same interest rate, the same algorithm, the results are as follows

Total loan amount: 260,000 yuan, total repayment amount: 437,536 yuan, and interest paid:177,536 yuan.

2557 yuan in the first month, a decrease of about 6.6538+0.9 yuan per month.

And so on. . . . . .