math question:fractions!?
what is 8 and 3/4 (eight and three quarters) -5 and 7/8(minus five and seven eighths) ?
i made both of the fractions the same and got 8and6/8 – 5and 7/8, but how do i subtract 7/8 from 6/8? i know i have to borrow, how do i do it?
Favorite Answer
8 and 6/8 = 8/8 + 8/8 + 8/8 + 8/8 + 8/8 +8/8 + 8/8 + 8/8 + 6/8 = 70/8
5 and 7/8 = 8/8 + 8/8 +(three more times)+ 7/8 = 47/8
So your problem is now (70 – 47)/8 = 23/8
And 8 goes into 23 two times with 7 left over
23/8 = 2 and 7/8.
Multiply the denominator by the whole number and then add the numerator. That is your new numerator and place it over the same denominator
First amount: 8 3/4 Multiply the denominator(4) by the whole number (8) and then add the numerator (3). That is your new numerator(35) and place it over the same denominator (4).
(4×8)+3= 35 then place over the same denominator
ans: 35/4
Second amount:
(8×5) + 7= 47
ans: 47/8
Next you have to make the fractions have a common denominator. You can do that by taking the first answer 35/4 and multiply both the top and bottom by 2.
You now get 70/8 – 47/8 = 23/8
Then you can reduce the fraction to the smallest term by dividing 8 into 23 and placing the remainder over the denominator.
8 goes into 23= 2 times with 7 remaining
answer is: 2 7/8 (two and seven eights)
Hope that helps. Also many colleges have math labs to help if you feel other topics are difficult.
Good start!
8 3/4 – 5 7/8 = ?
8 6/8 – 5 7/8 = ?
7 (8+6)/8 – 5 7/8 = ?
7 14/8 – 5 7/8 = ?
?=2 7/8
another way would be
8 3/4 – 5 7/8 = ?
8 6/8 – 5 7/8 = ?
(8*8+6)/8 – (5*8+7)/8 = ?
(64+6)/8 – (40+7)/8 = ?
70/7 – 47/8 = ?
(70-47)/8 = ?
23/8 = ? (23= 16+7)
2 7/8 = ?
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