To express 4 divided by 9 as a fraction, we simply write it in the form of a fraction where the numerator (the top number) represents the value being divided, and the denominator (the bottom number) represents the value by which we’re dividing. Therefore, 4 divided by 9 can be written as:
4/9
This fraction indicates that 4 is being divided into 9 equal parts. It’s already in its simplest form because the greatest common divisor of 4 and 9 is 1. Thus, 4/9 is the final answer.