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SquirrelJ
02 Feb 11 13:02
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Date Joined: 19 Mar 04
| Topic/replies: 165 | Blogger: SquirrelJ's blog
If I have the following decimal figure 1.03 which is 1/33 in a fraction.

Is there a quick way to be able to convert this into a fraction in my head? Or a technique that allows you to do this for other decimals as well

Say  decimal 4.33 which is 10/3

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Replies: 6
By:
tobermory
When: 02 Feb 11 17:21
It's 4.30 rather
By:
V4 Vendetta
When: 02 Feb 11 18:49
The quickest way depends on your knowledge of fractional times tables.  The sure way is to multiply through until there are only zeroes after the decimal point and then divide top and bottom through by each of the prime numbers as many times as they will go without producing decimals.

The 4.33 example is tricky because the decimal would need to be infinitely recurring to give 10/3.  Otherwise it's 433/100 because 433 is a prime number.  You'd need to attempt prime factors up to about 20 in your head if you didn't know that.  If you recognise the figures after the decimals (say .33... is a third) then you have the answer.
By:
V4 Vendetta
When: 02 Feb 11 19:00
In summary, the best way is to learn them backwards.  Lots of bookies can convert a lot faster than I can even though my intelligence and mathematical ability is massively greater.
By:
tobermory
When: 02 Feb 11 19:23
mine are obviously fkd
By:
Just Checking
When: 02 Feb 11 20:26
I'd imagine in the 4.X example it'd be best to ignore the 4 as it just complicates things and just look at the .33 and just know what is best to fit into that, i.e. (4).4 would be .. 2/5, then add the 4 (3) bit on so that would be 3 * 5 + 2 = 17/5?
Then if obviously can be reduced, reduce it. I never work in fractional odds, don't like them.
There are only so many fractions that are used so above idea might reduce the work.
By:
Coachbuster
When: 03 Feb 11 13:39
i'm surprised anyone still works in fractional odds ,especially on here Shocked

Its like moving to France and not learning French
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