Simplifying fractions - Make the numbers smaller
Which is the simpler fraction
Simplify fractions divide top and bottom by:
First 2, then 3, then 4, then 5.........
until you can't go any further.
NOTE:
The outcome of each division must be a whole number.
Example 1
Simplify the fraction `36/48`
Keep dividing by `2` first
`(36div2)/(48div2)=(18div2)/(24div2)=9/12larr9` won't divide by `2`
Now keep dividing by `3`
`(9div3)/(12div3)=3/4` This won't divide down any further
Answer: `36/48` simplified is `3/4`
Example 2
Simplify `26/39`
Keep dividing by `2` first
`26/39` won't divide by `2`
Now keep dividing by `3rarr` won't divide by `3`
Now keep dividing by `4rarr` won't divide by `4`
All the way up to
Now keep dividing by `13`
`(26div13)/(39div13)=2/3` This won't divide down any further
Answer: `26/39` simplified `=2/3`
Example 3
Simplify the fraction `90/144`
Keep dividing by `2` first
`(90div2)/(144div2)=45/72larr9` won't divide by `2` any more.
Now keep dividing by `3`
`(45div3)/(72div3)=(15div3)/(24div3)=5/8` This won't divide down any further
Answer: `90/144` simplified is `5/8`
Example 4
Simplify `3200/8000`
Take off the obvious `100`
`(3200div100)/(8000div100)=32/80`
Now keep dividing by `2` first
`(32div2)/(80div2)=(16div2)/(40div2)=(8div2)/(20div2)=(4div2)/(10div2)=2/5`
`2/5` won't divide down any further.
Answer: `3200/8000` simplified is `2/5`
Example 5
Simplify `10/40`
The first number we can divide by is `2`
`(10div2)/(40div2)=5/20larr` won't divide by `2` any more.
This can now be divided by `5`
`(5div5)/(20div5)=1/4` This won't divide down any further.
Answer: `10/40` simplified is `1/4`