1 what is the annual interest rate of 3%?

The interest rate of 3% is 0.3% per month, and 10000 yuan is a month in 30 yuan. A year in 360 yuan is 12 months.

Extended reading:

Cents:

A unit of length, one thousandth of a foot [Li, one thousandth of a China foot]. Another example: millimeter (millimeter)

Unit of weight, two thousandths [Li, one thousandth]

Plot unit, 1% of an acre [1% of Li]

Interest rate unit. For the annual profit, one percent is one percent; For the monthly profit, one percent is one thousandth.

References:

Baidu Encyclopedia: Li