subtracting fractions

1.SUBTRACTING WITH LIKE DENOMINATORS
You just subtract the numerators together.
EX.4/5-1/5=3/5

2.SUBTRACTING WITH UNLIKE DENOMINATORS
You have to find the lowest common denominator for both denominators in the the times tables. You have to multiply the the numerator by how much you multiplied the denominator.
EX.5/6-4/8

6x4=24 5x4=20

8x3=24 4x3=12              

20/24-12/24=8/24

3.SUBTRACTING MIXED WITH LIKE DENOMINATORS

subtract the numerator then the whole numbers 

EX.4 4/5-2 1/5

4-1= 3

4-2=2

so 4 4/5-2 1/5= 2 3/5

4.SUBTRACTING MIXED WITH UNLIKE DENOMINATORS

You have to find the lowest common denominator for both denominators in the the times tables. You have to multiply the the numerator by how much you multiplied the denominator. subtract the numerator then the whole number.

EX.2 1/2-1 2/4

2x2=4 1x2=2

4x1=4 2x1=2 

2-2=0

2-1=1

2 1/2-1 2/4=1