5/8 X 8/7?

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answers:
geezer say: 5/8 x 8/7

Multiply the numbers "on top" together ..... (5 x 8)
and the numbers "underneath" together ..... (8 x 7)

Giving you 40/56 .. which is 5/7

BUT .. in this case you don't have to do the multiplication !

You have (5x8) / (8x7) ... the 8's cancel each other out
leaving 5/7.
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larry say: circumference of your butthole?
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Como say: :--
5/8 x 8/7 = 5/7
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David say: The product is 5/7 in its simplest form.
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Jim Moor say: 5/8 X 8/7
= (8/8) 5/7
= 5/7
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RR say: To multiply fractions, multiply the tops together and multiply the bottoms together:
5/8 X 8/7
= 40/56
simplify it (both are divisible by 8)
= 5/7
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Krishnamurthy say: 5/7
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Raymond say: To multiply fractions:

(top * top) / (bottom * bottom)

5/8 * 8/7 = (5*8) / (8*7) = 40/56
reducing the fraction
40/56 = 20/28 = 10/14 = 5/7

shortcut (in this particular case)
we see that the denominaotr of one fraction (bottom) is equal to the numerator of the other (top).
On paper (or written down on Yahoo!Answers) it looks complicated but it is something that you can do quickly in your head.

Because the result of the multiplication does care about the order of the numbers (5*8 is the same as 8*5), we can swap the numerators:

5/8 * 8/7
swap the numerators
8/8 * 5/7

8/8 is "something over itself" and that is equal to 1
1 * 5/7

multiplying by 1 changes nothing so we can drop it, and we are left with
5/7
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Puzzling say: Original expression:
5 .... 8
--- × ---
8 .... 7

I'd cancel the 8s first:
5 .... 1
--- × ---
1 .... 7

Then multiply across:
5 .... 1 ... 5
--- × --- = ----
1 .... 7 ... 7

Answer:
5/7
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rick29148 say: 7/8 .................
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Sanjay say: 5/7 using cross-multiplication
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say: 5/8 x 8/7 = 40/56 = 20/28 = 10/14 = 5/7
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Jake No Chat say: 40/56, or 5/7
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alex say: Rule
(a/b)x(c/d) = (axc)/(bxd)
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Dan say: 0.71428571428
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Decoy say: Cross multiply to find the answer
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