# How to subtract dissimilar fractions?

2
by bLENH

2015-08-10T21:00:19+08:00
EX.
find the LCD
5/6-8/12
LCD=12
divide in the denominator  2  1
multiply in the numerator 10 12
10/12 1/12 subtract the numerator = 9 copy the denominator 12
9/12
2015-08-10T22:12:33+08:00
Subtraction of dissimilar fractions can be both and easy and hard. Here is the example:

Mrs. Santos bought 9 and 1/8 meters of curtain cloth. She used 3 and 5/6 meters to make curtain for the master's bedroom window. How many meters of cloth were not used? To find out, we subtract 3 and 5/6 from 9 and 1/8.

find the LCD      Rename dissimilar mixed   compare the
9 1/8                  numbers to equivalent           fraction in the
-3 5/6                 mixed numbers using LCD  minuend and the
LCD=24           9 1/8= 9 1 x 3= 9 3                    subtrahend. Rename
8
x 3      24                   and regroup the
-3 5/6= 3 5 x 4=3 20                    minuend.
6 x 4     24             9 1/8= 9 3/24= 9 + 3/24

=8 + 1 + 3/24

=8 + 24/24 + 3/24

=8 27/24

And lastly. Subtract... Write the digit in the lowest term.
9 1/8= 8 27/24
- 3 5/6= 3 20/24
5 7/24

And the answer is................................. 5 7/24