You just add the numbers above the line (this number is called the Numerator).įraction Calculation Example 1: 2⁄3 - 1⁄3 = 1⁄3 Easy eh? When the denominator of both fractions is the same, subtracting the fraction is simple. The trick with subtracting fractions is to keep your eye on the number under the line, this number is call the Denominator. Our fraction in this case is greater than one (23 parts of a 20 piece puzzle) so we can write the fraction as 1 3⁄20 How to Subtract Fractions We then repeat the exercise for our other fractionįraction Calculation Example 2e: 4 x 2 = 8 We multiply 2 by 4 as we previously multiplied 5 by 4.įraction Calculation Example 2f: 8⁄20 is the equivalent fraction of 2⁄5.Įxcellent, we now have two fractions to add that have common denominators as we made them into equivalent fractions that are easier to add together.įraction Calculation Example 2g: 8⁄20 + 15⁄20 = 23⁄20. In order to make our fractions equivalent, we must complete the same action to the top number (the numerator) as we did to the bottom number (the denominator)įraction Calculation Example 2c: 5 x 3 = 15 We multiply 3 by 5 as we previously multiplied 4 by 5.įraction Calculation Example 2d: 15⁄20 is the equivalent fraction of 3⁄4. Now, in order to make our original fractions Equivalent Fractions.Īn Equivalent Fraction is a fraction of the same value, written in a different format, for example 1⁄2 is the same as 2⁄4 and 5⁄10. So, your trying to add a fraction and you need a Common Denominator, how do you get it? If you are working with 2 fractions, you can find a common denominator simply by multiplying the denominators:įraction Calculation Example 2a: 2⁄5 + 3⁄4 our two denominators are 5 and 4.įraction Calculation Example 2b: 5 x 4 = 20 We multiply them: 20 is our Common Denominator. There is a simple rule when adding fractions, the denominations must always be the same, in mathematical terms this is called a Common Denominator as all the denominators have the same 'common' value. Now, adding fractions becomes a little (but only a little) more complicated when the denominators (the number on the bottom, under the line) of the fractions that you are adding are not the same. You just add the numbers above the line (this number is called the Numerator).įraction Calculation Example 1: 1⁄3 + 1⁄3 = 2⁄3 Easy eh? When the denominator of both fractions is the same, adding the fraction is simple. The trick with adding fractions is to keep your eye on the number under the line, this number is call the Denominator. The following examples show how to complete math with fractions. In mathematical terms, a fraction is a numerical quantity that is not a whole number: 1⁄2, 1⁄4, 3⁄8 etc.
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