In order to write a decimal number as a fraction, you need to pay attention to the numbers before and after the decimal point. For example, 4.075 reads four point seventy-five thousandths. The number leading to the comma must be written as the whole-number part of the fraction, in this example 4 is the whole-number part. As the numerator, you must write the number 75, which comes after the decimal point, and to write the denominator, you need to count the number of decimal places after the decimal point. In our example, the decimal number after the decimal point has three digits, so the denominator of the fraction can be written as 1 and three zeros 1000. We get:
It can be concluded that to write the denominator, it is necessary to write as many zeros after 1 as the decimal places after the decimal point.