2007-09-20 05:05:06 · 22 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
7/8-3/2..... Start with the given expression
In order to subtract these two fractions, these fractions need to have a common denominator.
In order to do that, we simply find that the LCM of 8 and 2 is 8
Now we need to get each denominator to 8
-(4/4)(3/2)..... Multiply 3/2..... by (4/4)
-12/8..... Multiply 3/2 and (4/4) to get 12/8
Since both fractions have a common denominator of 8, we can now combine the fractions
(7-12)/8..... Combine the fractions
-5/8..... Subtract the numerators
So
7/8-3/2 = -5 / 8
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2007-09-20 05:16:33 · answer #1 · answered by Jim 5 · 0⤊ 0⤋
That's 7/8 - 12/8 = -5/8
2007-09-20 12:09:47 · answer #2 · answered by steiner1745 7 · 1⤊ 0⤋
Finally a math question I can do. You need to find the least common denominator which in this case is 8. To make the demoninator of 3/2 = 8, you multiply 3/2 by 4 and get 12/8. Then subtract 12/8 from 7/8 and you get - 5/8.
2007-09-20 12:15:17 · answer #3 · answered by luckythirteen 6 · 0⤊ 0⤋
In order to answer this question, you must find a common denominator and convert so that both fractions have the same denominator. Looking at the two, we can see that 8 is the LCD. How do you turn 2 into 8? Multiple by 4. So you multiply 3/2 x 4/4 to get 12/8. What is 7-12? -5. So your end product is -5/8. You would reduce if necessary, but it cannot be reduced any further.
2007-09-20 12:11:39 · answer #4 · answered by Kristina D 2 · 1⤊ 0⤋
7/8-3/2
=7-12/8
=-5/8
2007-09-20 12:15:42 · answer #5 · answered by kei_sea 1 · 0⤊ 0⤋
to compute this the easiest this is to make sure both fractions have the same denominator. We can multiply 3/2 by 4/4 (which equals 1) to get 12/8.
Once wa have this the subtraction is easy
7/8 - 12/8 is the same as (7-12)/8, or -5/8.
Answer: -5/8
2007-09-20 12:11:28 · answer #6 · answered by Kirsten B 1 · 1⤊ 0⤋
Find the LCD which is eight, then multiply 2 by 4 to get 8 and 3 by 4 to get 12.
(7/8)-(12/8) = -5/8
2007-09-20 12:13:43 · answer #7 · answered by Darkskinnyboy 6 · 0⤊ 0⤋
7/8 - 12/8 = -5/8
2007-09-20 12:12:36 · answer #8 · answered by Anonymous · 0⤊ 0⤋
To add or subtract, the bottom numbers need to be the same. So multiply the 3/2 by 4 (top and bottom) to get 12/8. Then do the subtraction. 7/8 - 12/8 = -5/8. Simple, right?
2007-09-20 12:10:35 · answer #9 · answered by David B 3 · 0⤊ 0⤋
The Least Common Denominator (LCD) is 8, thus:
7/8 - 12/8 = -5/8
2007-09-20 12:12:21 · answer #10 · answered by edith p 3 · 0⤊ 0⤋