Adding fractions can be confusing if you don't understand it. But, it can actually be quite simple if you do understand it. An example of adding fractions is 5/7 + 1/2:
To add fractions, you find the common denominator. Then, to find out the numerator, you cross multriply (it's the easiest way)
Another example of adding fractions is 5/9 + 1/3.
One last example on adding fractions is 10 1/2 + 6 4/5.
For subtracting, I'll use 3 3/8 - 2 3/4 as an example.
Subtracting fractions is basically the same as adding them; the rules still apply. But when you have a mixed number, you change it into an improper and subtract from there.
* To convert a mixed number into improper, multiply the whole number by the denominator and add the numerator.
Multiplying fractions is pretty straight forward; just multiply the numerators together and the denominators together. Simplify if possible. An Example is 4/5 x 1/2.
The next example contains a mixed number. All you have to do is convert the mixed number into an improper fraction, multiply, and then convert it back into a mixed number as your answer.
Ask yourself the question "How many groups of __ are in __?" when dividing fractions. I'll explain how to divide fractions by using a ration table.
Example: 3/4 / 1/3.
Fifteen scoops of flour makes 6 2/3 cakes.
This question is pretty self-explanatory; all you have to do is multiply how many hours of daylight by the period of how long it was sunny.