# Fractions

## Numerators & Denominators

The numerator is the number of parts you have, (on the top) and the denominator is the number of parts that the whole is divided into, (on the bottom).

## Fraction Rules

Subtraction: Make sure each fraction have the same denominators, using any method you like, now just subtract numerator by numerator and denominator by denominator.

Addition: Like subtraction make the denominators the same, with whatever method you prefer then just add across (numerator by numerator and denominator by denominator).

Division: When diving fractions all you have to do is reverse the second fraction so the numerator is at the bottom and the denominator is at the top. Then you just multiply the first fraction's numerator by the second fraction's numerator, and the same for the denominators.

Multiplication: For multiplying fractions first you have to simplify the fractions if not in lowest terms, then multiply the numerators of the fractions to get the new numerator and finally multiply across (numerator to numerator, denominator to denominator).

It's a piece of cake!

## Least Common Denominator

Instead of dealing with really high numbers try to reduce them. Like instead of 20 try 10, that's still to high so try 5. You can find these numbers just by dividing. Make sure you do the same thing to the top that you did to the bottom. Remember that fractions don't have decimal numbers only whole numbers!

## Equivalent Fractions

When dealing with equivalent fractions there is one rule you must follow is: whatever you do to the bottom you do to the top. Equivalent fractions may have different numbers, but they equal the same thing. They are the same because no matter what you do to it (multiply or divide) it will always keep it's value. For example 1/2 is equal to 50/100.

## Fraction Word Problems

1. Mrs. Tyrer owns a store and sells chocolate bars for \$6. She had some complaints about her prices being too high so she said from now on the chocolate bars would be 1/3 of the price cheaper. How much do her chocolate bars cost now?

2. Carlie and Brooke-lyn went to get pizza. They ordered a large pizza which has 10 pieces of pizza in it. They both ate 2/5 of the pizza. Then Carlie's dog got at the pizza while Carlie and Brooke-lyn weren't paying attention. The dog ate 2/10 of the pizza. How much pizza is left in the pizza box?

3. A cookie recipe says to put in 1 and 1/3 of a cup of water. This only makes 10 cookies. Ally wants 30 cookies. How much water will she need?

4. For Noah's birthday he got a really nice cake shaped like a scooter. If Noah and Matt ate 4/7 of the cake and the next day Noah's dad ate 1/2 of what was left. How many slices of cake are left?

## Improper Fractions & Mixed Numbers

An improper fraction has a larger numerator than (or equal to) the denominator, for example:8/6.

A mixed number is a whole number and a proper fraction combined together, for example: 3 1/3.

Fraction Jackson