According to the meaning of the question, the loan principal =2500 yuan and the daily interest rate =0.05%.

According to the formula, daily interest = principal * daily interest rate.

Substituting the data in the question, we can get the formula:

Daily interest =2500*0.05%= 1.25 (yuan)

Extended data:

Influencing factors of interest rate:

1, central bank policy

Generally speaking, when the central bank expands the money supply, the total supply in loanable funds will increase, the supply exceeds demand, and the natural interest rate will decrease accordingly; On the contrary, the central bank implements a tight monetary policy to reduce the money supply, so that the demand in loanable funds exceeds the supply, and the interest rate will rise accordingly.

2. Price level

Market interest rate is the sum of real interest rate and inflation rate. When the price level rises, the market interest rate also rises accordingly, otherwise the real interest rate may be negative. At the same time, due to rising prices, the public's willingness to deposit has declined, while the demand for loans from industrial and commercial enterprises has increased. The imbalance between deposit and loan caused by loan demand exceeding loan supply will inevitably lead to an increase in interest rates.

3. Stock and bond markets

If the securities market is on the rise, the market interest rate will rise; On the contrary, interest rates are relatively low.

4. International economic situation

Changes in a country's economic parameters, especially exchange rate and interest rate, will also affect the fluctuation of interest rates in other countries. Naturally, the rise and fall of the international securities market will also bring risks to the interest rates faced by international banking business.

Multiplication algorithm

1, integer

(1) Multiplies the first factor by the number on each bit of the second factor in the unit;

(2) Multiply by the number on the second factor, and the last digit of the number is aligned with the second factor;

(3) Add the multiplied numbers several times;

2. Decimals

(1) first quadrature according to the law of integer multiplication;

(2) Look at how many decimal places there are in the factor, and count the decimal places from the right side of the product.

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