Question

what is 7/8 minus 6/7

Answer 1

You should first find the comment denominator.

Answer 2

can u help me

Answer 3

Find a common demoniator. What's the least common multiple of 8 and 7?

Answer 4

idk

Answer 5

i forget

Answer 6

Alright. List the multiple of 8.
ex: 8, 16, continue it.

Answer 7

8, 16, 24,36,

Answer 8

Not 36, but 32. ;)
Continue.

Answer 9

7 x7 49
-- = --
8 x7 56

6 x8 48
-- = ---
7 x8 56
------------

Subtract.

Answer 10

40, 48,

Answer 11

what

Answer 12

Continue. A little bit more.

Answer 13

56, 64

Answer 14

Actually. I'll show you a trick. What does 8 * 7 give you?

Answer 15

56

Answer 16

Alright. That's a common denominator. It may or may not be the least common denominator. But it's a common Denominator. What do you think the ? is?