If the probability that Kim has a math test today is 4/7,
then the probability that she does not have a math test today is 1 - 4/7 = 3/7.
The answer is: \frac{3}{7}
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If the probability that Kim has a math test today is 4/7, what is the probability that Kim does not have a math test today, expressed as a common fraction?

### Answer:
