How do you write 0.045 as a fraction?

To write 0.045 as a fraction, we first recognize that the decimal point is three places to the right of the decimal. Therefore, we can express 0.045 as 45/1000. To simplify this fraction, we can divide both the numerator and denominator by 5, resulting in 9/200. Thus, 0.045 can be written as the fraction 9/200.