How do you write 0.22 as a fraction?

To write 0.22 as a fraction, you first identify that it is a decimal number. Since there are two digits after the decimal point, you can write 0.22 as 22/100. To simplify this fraction, you can divide both the numerator and denominator by their greatest common factor, which is 2. Therefore, 0.22 can be written as 11/50 in its simplest form.