Let's break down the problem into parts.

1. Joe's running distance:
   Every time Joe runs, he runs $\frac{2}{4} = \frac{1}{2}$ mile.

2. Jane's running distance:
   Jane runs $\frac{4}{4} = 1$ mile each time she runs.

3. Joe's weekly running:
   Joe runs twice a week, covering $2 \times \frac{1}{2} = 1$ mile in a week.

4. How often Jane needs to run to match Joe's weekly distance:
   Since Jane runs 1 mile each time, she only needs to run once per week to cover the same distance that Joe runs in a week.

Final Answer

Jane would need to run 1 time per week to cover the same distance as Joe when he runs twice a week.

Would you like a deeper explanation, or do you have any questions?

Here are some related questions for further practice:

1. If Joe increased his weekly runs to 4, how many times would Jane need to run?
2. What if Jane wanted to run only half the distance Joe runs; how often should she run?
3. If Jane’s running distance changed to 3/4 of a mile, how many times would she need to run?
4. How many miles would Joe run in a month (4 weeks) at his current pace?
5. If Joe and Jane both wanted to cover 5 miles in a week, how often should each run?

Tip: For unit comparisons, break down the problem into smaller steps to ensure accuracy.