**Calculate and Find 40 percent of a number :**

- Select any two or three digit number.
- Now multiply the number by 4.
- Third step is to shift the decimal point one place to the left side.

**Example 1 **

- Let us
**select**two digit number, it is 32. - Now multiply number 32 by
**4**, so 32x4=128 - Now
**shift the decimal point one place to the left**so**12.8** - Hence
**40 % of 32 is 12.8**

**Example 2**

- Let us
**select**three digit number, it is 200. - Now multiply number 200 by
**4**, so 200x4=800 - Now
**shift the decimal point one place to the left**so**80.0** - Hence
**40 % of 200 is 80**

There are several other articles on number so check it out one by one.