The number 12 can be expressed as a fraction in a couple of ways. The most straightforward way is to write it as 12/1. This means that 12 is the numerator (the top part of the fraction) and 1 is the denominator (the bottom part of the fraction).
In general, any whole number can be turned into a fraction by placing it over 1. So, when we say 12 as a fraction, we are essentially showing that there are 12 parts of something when it is divided into 1 whole. This representation helps us in various mathematical calculations, especially when we deal with addition, subtraction, or any fractional operations.