To figure this out, we must firstly find the least common denominator (LCD).
5, 10, 15, 20, 25
15, 30, 45
Here the LCD is 15.
We must now take 2 and multiply by the amount of numbers it took to get to 15 on our first line. It was 3 places, therefore we are going to multiply by 3.
2 * 3 = 6.
And there you have it. Here's your answer:
6/15.