Denominator of seven eights, ie of fifty six is 1. The denominator of five sixths is 6 so the common denominator is 6.
sixths
3 sixths - 2 sixths = 1
No
Two thirds is actually equal to four sixths. You have to reduce four sixths by dividing the numerator and denominator by a common factor, which in this case is 2.
31/48
LCD(8, 6) = 24
The least common denominator of five sixths and one fourth is: 12.
The least common denominator of three fourths and five sixths is twelve.
12 & 24
sixths
3 sixths - 2 sixths = 1
90 is your common denominator.
12
Four sixths. ^^ You see, 6 is the common denominator, so, you work with one half. Now, you have to make 6 the denominator, right? So, you multiply 2 by 3 and 1 also by three, and then you have to add three sixths and one sixths and you get four sixths.
No
No.
18...i guess :P