Hello! 20000 divided by 12 is what you have to pay back every month, but the handling fee must be added for the first phase, and the first phase needs to pay back 20000 * 7.2% =1440+1666 = 3106 yuan.

The first month is 3 106, and the second month is about 1666 yuan.

Calculation formula: monthly interest = principal× annual interest rate ÷ 12.

Interest rate refers to the ratio of the interest amount due in each period to the par value of the borrowed, deposited or borrowed amount (called the total principal). The total interest of the lent or borrowed amount depends on the total principal, interest rate, compound interest frequency and the length of time of lending, deposit or borrowing. Interest rate is the price that the borrower needs to pay for the money borrowed, and it is also the return that the lender gets by delaying his own consumption and lending it to the borrower. Generally speaking, interest rates are expressed by annual interest rate, monthly interest rate and daily interest rate. The interest rate is usually calculated by the percentage of one-year interest to the principal. The monthly interest rate refers to the monthly interest. The monthly interest rate is expressed as a few thousandths of the principal. The monthly interest announced by the bank is basically expressed after one year. For example, the annualized deposit interest rate for three months is 2.6% (the bank is listed), but the actual rate of return for the current period is only 0.65%, the annual interest rate is generally% (percentage), and the monthly interest rate is generally expressed as ‰ (one thousandth); The daily interest rate is expressed as a few tenths of the principal, which is usually called a few cents. If the daily interest rate is 1%, that is, the principal is 1 yuan, and the daily interest rate is 0.005438+0 yuan. (1% =0.00 1 yuan, 10 cents =0.000 1 yuan)

Calculation formula: daily interest rate _ annual interest rate ÷360= monthly interest rate ÷30. Relationship between annual interest rate and monthly interest rate: monthly interest rate = annual interest rate/12, annual interest rate = monthly interest rate × 12.

Matters needing attention in calculating interest:

1. When calculating interest, the number of days of deposit is calculated at the beginning, not at the end, that is, from the date of deposit to the day before withdrawal;

2, regardless of leap year, average year, regardless of the size of the month, 360 days a year, 30 days a month;

3. Calculated by year, month and day, the maturity date of various time deposits shall be subject to year, month and day. That is, from the deposit date to the same day of the following year is a pair of years, and the deposit date to the same day of next month is a pair of months;

4. Maturity date of time deposit. For example, if you don't work on legal holidays, you can withdraw one day in advance and calculate interest at maturity. The procedure is the same as that of early withdrawal.

The calculation formula of interest: principal × annual interest rate (percentage) × deposit period.

If the interest tax is X (1-5%)

Total principal and interest = principal+interest

The calculation formula of accrued interest is: accrued interest = principal × interest rate × time.

Accrued interest shall be accurate to two decimal places, and the number of interest-bearing days shall be calculated according to the actual holding days.

PS: The deposit period should correspond to the interest rate, not necessarily the annual interest rate, but also the daily interest rate and the monthly interest rate.

One month's interest is principal × monthly interest rate 1.5%, and one year's interest is principal × monthly interest rate 1.5%× 12. For example, if you borrow 20,000 yuan, and the monthly interest is = 20,000×1.5 %×1= 300 yuan, the monthly interest is 300 yuan, and the annual interest needs to be multiplied by 12, which is 3,600 yuan.