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Percent, Decimal, and Fraction

Page history last edited by PBworks 16 years, 4 months ago

Fraction, Decimal, and Percent

 

Change Fraction to Decimal:

 

If you have a fraction, you use the numerator divided by the denominator, and then you will get a demical

 

number. That's how fraction change into a decimal.

 

Example: 1/2 = 0.5 use 1 divide by 2 then you will get 0.5

 

If the numerator is bigger than the denominator, the decimal you get will be greater than 1.

 

Example: 6/4 = 1.5 1.5>1 you use 6 divide by 4, you get 1.5, because 1 equals to 4/4, and 0.5 means 2/4, so if you add them together you will get 6/4. Or write it in mixed number, it will be 1 2/4.

 

Change Decimal Back to Fraction:

 

If you want to change a decimal back to a fraction you will:

 

Example: Express 0.75 as a fraction.

Step 1: Write down:

0.75
 
1

Step 2: Multiply both top and bottom by 100 (becasue there were 2 digits after the decimal place):

× 100
0.75 = 75
   
1 100
× 100

 

Step 3: Simplify the fraction:

÷ 25
75 = 3
   
100 4
÷ 25

Answer = 3/4 

If you have a decimal, you just move 2 place values to the right to get a percent, and don't forget the percent sign.

 

   Example: 0.5 =50%

 

From Decimal To Percent  
move the decimal point 2 places to the right, and add the "%" sign.

 

 

Change Percent Back to Fraction:

 

 

ok finally, if you want to change percent back to fraction, ummmmmmm it a little more complicated, but if you are smart then i am sure you can get it.

 

ok here it is, when you get a percent. You ''cut'' the percent sign, put the number on the numerator, and put 100 on the denominator, because 100/100 equal to 1.

 

 Then if you want to simplify just find the common fractor and simplify.

 

 Example: 50% =50/100=1/2

 

If you dont know how to change a specific frication to a decimal try this link: http://www.webmath.com/fract2dec.html

 

And here is another web page you could try if you need help: http://www.gomath.com/exercises/DecimalsFractionsPercent.php

 

And if you need help on fraction to decimal ty this page: http://www.csgnetwork.com/decimal2fractwecalc.html

 

 

 

Identifying Equivalent Decimals and Fractions

 

 

Decimals are a type of fractional number. The decimal 0.5 represents the fraction 5/10. The decimal 0.25
represents the fraction 25/100. Decimal fractions always have a denominator based on a power of 10.

We know that 5/10 is equivalent to 1/2 since 1/2 times 5/5 is 5/10. Therefore, the decimal 0.5 is equivalent to 1/2 or 2/4.

 

    Some common Equivalent Decimals and Fractions:
  • 0.1 and 1/10
  • 0.2 and 1/5
  • 0.5 and 1/2
  • 0.25 and 1/4
  • 0.50 and 1/2
  • 0.75 and 3/4
  • 1.0 and 1/1 or 2/2 or 1 

 

What is Fraction

 

 

In mathematics, a fraction is a concept of a proportional relation between an object part and the object whole.

 

Each fraction consists of a denominator and a numerator, representing the number of equal parts that an object is divided,

 

and the number of those parts indicated for the particular fraction.

 

What is Percent

 

 

In mathematics, a percentage is a way of expressing a number as a fraction of 100 (per cent meaning "per hundred"). It is

 

often denoted using the percent sign, "%".  

 

What is Decimal

 

A number that uses place value and a decimal point to show values less than one, such as tenths and hundredths.

 

 

 

PS here is a page Wiki about Converting Fractions to Percents

 

and another Wiki page about Converting fractions to decimals

 

 

 

From :      

the fraction picture is from Denielle C's page

 

http://www.mathsisfun.com/converting-decimals-percents.html

 

http://www.aaamath.com/dec42c-idequivdecifract.html

 

http://en.wikipedia.org/wiki/Percent

 

http://en.wikipedia.org/wiki/Decimal

 

http://en.wikipedia.org/wiki/Fraction_%28mathematics%29

 

http://webinstituteforteachers.org/99/teams/rationals/glossary.html

 

Comments (12)

Anonymous said

at 2:20 pm on Oct 24, 2007

Nice work! :] But maybe you should explain what fractions, decimals, and percents are first and how they're all related.

Anonymous said

at 8:05 pm on Oct 28, 2007

That's really good

Anonymous said

at 10:42 pm on Oct 28, 2007

you spelled(decimal)wrong.

Anonymous said

at 1:15 pm on Nov 5, 2007

COol! luv the color! a bit bunched up, yes?@o^

Anonymous said

at 2:46 pm on Nov 5, 2007

The light blue is a little hard to read, you might want to think about making it a little darker. But that's just my opinion. Some of the lines are cut off also, so it might look better if there are more spaces between lines.

Anonymous said

at 4:54 pm on Nov 5, 2007

i like it, a little tough to read. try a different color, and a bigger font!

Anonymous said

at 7:25 pm on Nov 5, 2007

Ooooohh.Very 1337. It's very colorful, and the tables are helpful. Still, could you please add definitions of fractions, decimals, and percents? That would be VERY helpful. =^____^=

~|-||_|95- ^__^

Anonymous said

at 7:38 pm on Nov 5, 2007

the colors you used are very hard to read

Anonymous said

at 7:38 pm on Nov 5, 2007

Some of the words are bunched up...you should fix that. I know most people who use MySpace and all that can read the bright colors (like the bright and light blue you used), but not me. That just kind of stings my eyes...

Anonymous said

at 7:39 pm on Nov 5, 2007

your page is pretty colorful and is hard to read

Anonymous said

at 9:13 pm on Nov 6, 2007

YOUR PAGE IS VERY COLURFUL, SOME THINGS ARE YOO HARD TO rEAD aLSO sOmE wORdS ArE oVERLAPING, YOU SHOULD FIX THaT sOON, oTHER THAN THAT YOUR PAGE LOOKS FANTABULOUS, j.k, OTHER THAN THAT YOUR PAGE LOOKS VERY GOOD

Anonymous said

at 6:09 pm on Nov 21, 2007

Very nice, great information.

4 of 4 points
11.5 of 12 total project points

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