can you show me the work for 7/8-5/12

Question

anonymous · Answer

Find the least common denominator, which is 24

(7(3)-5(2)) / 24
(21-10) / 24
11/ 24

anonymous · Answer

where did you get the 3?

anonymous · Answer

Multiplying by 3/3 to the (7/8) yields (21/24)

anonymous · Answer

could you explain the equation to me step by step I am having a really tough time getting it

anonymous · Answer

I thought the least common denominator would be 4 becuse 4 goes into 12 and 8

anonymous · Answer

Sure,

Since we established that the LCD is 24, 

You have to make both of the fractions in the form where the denominator is 24 for both.  
For 7/8, to make it have the denominator 24, multiply 3/3 to it and you get:
21/24
For 5/12, to make the denominator 24, multiply 2/2 to it and you get:
10/24

Subtract both fractions together and youll get 11/24

anonymous · Answer

thank you