To express 2 divided by 7 as a fraction, you simply write it as it is: 2/7.
In math, dividing a number by another can be represented as a fraction. In this case, the numerator (the top part of the fraction) is 2, which is the number we are dividing, and the denominator (the bottom part of the fraction) is 7, which is the number we are dividing by. Therefore, 2 divided by 7 is equal to the fraction 2/7.