To convert a common fraction to a decimal fraction, what operation do you perform?

To convert a common fraction to a decimal fraction, the operation performed is dividing the numerator by the denominator. This method is rooted in the definition of a fraction, where the numerator represents how many parts of the whole we have, and the denominator indicates the total number of equal parts that the whole is divided into. By executing the division, you determine how many whole times the denominator fits into the numerator, effectively converting it into a decimal form. This is essential in welding print reading, as understanding decimal representations is crucial for measurements and calculations related to welds and other specifications.