1, the annual interest rate of 1.5 is15%;

The annual interest is:100000 *15% =15000 yuan.

2. One fifth of the monthly interest rate is the monthly interest rate 1.5%;

The annual interest is:100000 *1.5% *12 =180000 yuan.

Note: In view of the possibility of disputes caused by this statement or agreement on "dividing", the interest shall be calculated according to the prevailing interest rate expression in the loan agreement, that is, the annual interest rate is 65,438+05% or the monthly interest rate is 65,438+0.5%.

Extended data:

Private loan interest rate-%.

The common unit of private lending is "Li", which means several thousandths. For example, 3% interest is 0.3%, and interest is calculated by time. Before calculation, it is necessary to distinguish whether it is day, month or year.

For example, Zhang San borrowed 1 0,000 yuan from Li Si, saying that he would pay 5% daily interest and borrow 1 month.

So what Li Si means is to borrow 1 0,000 yuan from Zhang San, give Zhang San 0.5% daily interest, 1 0,000+10,000 * 0.5% * 30 =11,and give it to Zhang San after 500 yuan.

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