Why is it important to know how to convert fractions into decimals and decimals into fractions

When, in reference to decimals, we talk about "a 4 in the tenths place" (as in the section on place value in Decimals, what we mean is 4 tenths, or 4/10. Similarly, a 9 in the hundredths place is equal to 9/100 ... In general, to convert a decimal into a fraction, write the decimal as a fraction over 1

Well, it can be important to know in the beginning so you can learn more advanced mathematics. It can also simplify jobs that require decimals and fractions like cooking, engineering, things like that.