The first step to simplify a fraction is to identify the largest number that divides to both the numerator and the denominator
You need to know that the highest number that you need will be in any of the denominators. After that you won't do anything with the denominators and you will block the denominators out the rest of the way and solve the equation on top
Sorry I left something out. When you see the biggest number in the denominator you will plug it in to the bottom and top of all of the fractions
Then so on
You find the least common multiple that the numerator and denominator can be divided by  and keep dividing until you cant anymore (if necessary)