# fractions, decimals and percentages notes

- Created by: louisepardoe
- Created on: 07-06-16 07:47

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**fractions**

cancelling down

- divide top and bottom by the same number

multiplying

- multiply top and bottom separately

dividing

- turn second fraction upside down and then multiply

common denominators

- times denominators together
- times numerators by opposite denominators

adding and subtracting

- make sure the denominators are the same
- add or subtract the top lines only

finding a fraction of something

- multiply the something by the top of the fraction and divide it by the bottom

**fractions, decimals and percentages**

- 1/2, 0.5, 50%
- 1/4, 0.25, 25%
- 3/4, 0.75, 75%
- 1/3, 0.33.., 33.33%
- 2/3, 0.66.., 66.66%
- 1/10, 0.1, 10%
- 1/5, 0.2, 20%
- 2/5, 0.4, 40%
- fraction to decimal= divide
- decimal to percentage= x by 100
- percentage to decimal= divide by 100
- terminating decimals to fractions- digits after decimal point on top, power of ten on bottom with the same number of 0's as there were decimal places

**fractions and recurring decimals**

recurring decimals into fractions

basic ones

- name your decimal
- multiply it by a power of ten to move it past the decimal point by…

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