To solve this all you need to do is take the fraction 2/5 and multiply it by a number (this means you multiply BOTH the denominator and the numerator)
1. Multiply the original fraction by 2:

2. Multiply the original fraction by 3:

3. Multiply the original fraction by 4:

4. Multiply the original fraction by 5:

5. Multiply the original fraction by 6:

All of the fractions above are equal to 2/5 and to each other. You can keep doing this with higher numbers if you wold like, but these are just a few examples.
Hope this helped!