Simplifying Rationals?

Question

5/6 - a/b

McFate, thank you, that's the answer I got too, I just wanted to make sure I was doing it correctly, because I didn't learn the lesson! :)

Answer 1

Find the least common denominator (6b) and put both fractions in its terms:

5/6 - a/b
(5/6 * b/b) - (a/b * 6/6)
5b/6b - 6a/6b
(5b - 6a)/6b