To express 3 divided by 7 as a fraction, simply write it as it is mathematically represented. The number 3 is the numerator, which is the top part of the fraction, and 7 is the denominator, which is the bottom part of the fraction. Therefore, 3 divided by 7 can be written as:
− 3/7
This means you are taking 3 parts of a whole that is divided into 7 equal parts. It is a simple and clear representation of the division operation in fractional form.