Fractions

=** __Finding The LCD:__ **=

To find the LCD you find the least common factor of both the denominators.  =__How to add fractions with like denominators:__=

To add fractions with like denominators, you add the numerators and keep the denominator. Then simplify. Example: 1/4 + 5/4 = 6/4= 1 2/4= 1 1/2

__**How to add fractions with unlike denominators:**__ **Example: Solve 1/4 + 2/5 =** **__How to subtract fractions with like denominators:__** To subtract fractions with like denominators, you subtract the numerators and keep the denominator. Then simplify. Example: **__How to subtract fractions with unlike denominator:__** 1) Find the LCD. 2) Change the numerator and subtract. 3) Keep the denominator. 4) Simplify. Example: 3/7 - 2/14 = __**How to multiply ALL fractions:**__ To multiply fractions, just multiply across. Then simplify. Example: 5/7 x 2/8 = 10/56 5/28 __** How to divide ALL fractions: **__1) Change the division sign to multiplication. 2) Change the 2nd number to its reciprocal. 3) Then multiply. 4) Then simplify. Example: 2/3 / 2/5 =
 * 1) Find the LCD.      2) Change the numerator and add them.       3) The denominator stays the same.       4) Simplify.
 * 4:20 5:20
 * 5 + 8 =13
 * 13/20
 * 13/20
 * 7/8 - 3/8 =
 * 7 - 3 = 4
 * 4/8
 * 1/2
 * LCD: 14
 * 6 - 2 =4
 * 4/14
 * 2/7
 * 2/3 x 3/5
 * 2/3 x 5/3
 * 10/9
 * 1 1/9

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