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How to estimate fractions - Microsoft Xbox 360 Console

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Not quite a video game question but let me see if I can help.

We'll start off with simple ones and progress from there.

Half = 1/2 = .5
Say you have 22.5, this number will be 22 1/2, if you want this as just a fracton you will multiply the denominator to the whole number and then add the numerator to get the whole fraction; 45/2

Quarters = 1/4 & 3/4 = .25 & 75
Think of it this way: you can have 4 quarters that equal a dollar. Each quarter represents 1 out of 4 (1/4) parts of the dollar. To reduce, think about having a 50 cent piece; yes it is technically a quarter but it's also half, so 1/4 and 3/4 would be most appropriate.

When estimating fractions, think about its closest quarter.
Take .88 for example:

The 2 quarters .88 falls between are 3/4 (75 cents) and 4/4 (1 Dollar). This is where you think of place holders. You know 88 is 13 away from 75, and 12 away from 100 (1 Dollar); therefore you can say its pretty much inbetween them.

This is the important part that will help you:

You know now that there are 4 quarters to a dollar; when you need to meet between the quarters, you will use 8ths = half a quarter. So... between 0/4 and 1/4 there are 2 8ths: 1/8, 2/8 (2/8=1/4) continue up until you've reached the lower number your trying to get between, in this example its .75. There are 6 8ths before .75, so you are left with 2 left because 8/8 = 1. You dont want to go to 1 so in this instance you'll add another 8th. You're now up to 7/8.

This example works out very well because 7/8 is exactly .875, round this 5 up and you get .88 which is closely equal to 7/8.

The way to go about estimating from here is to keep cutting the denominator in half until you find something that's close to your given number. Remember your quarters and even knowing your 8ths will help you out in the long run.

Also, if anything is just a single decimal (i.e. in .9, .7) put this number over 10 and you have the fraction, just remember to reduce if both the top and bottom numbers are even numbers.

All I ask is for the very helpful rating since you've just asked me to remember things from school 15 years ago.

Good luck!

Respectfully,

Don

Posted on Sep 15, 2010

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