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7/8 + 5/6
Find the least common denominator
8- 8, 16, 24...
6 - 6, 12, 18, 24
24 seems to be the least common denominator
We know that 8x3 = 24 so 7x3=21 and 6x4=24 so 5x4=20 (whatever we do to the denominator, we do to the numerator)
Now the fractions are:
21/24 + 20/24
Add the numerators and keep the denominator of 24 the same.
(21+20)/24 = 41/24 = 1 17/24
Final answer is 1 17/24
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Five ninths plus negative three eighths?
To add the fractions five ninths and negative three eighths, you need to find a common denominator. The least common multiple of nine and eight is 72. Convert both fractions to have a denominator of 72 and then add the numerators. The result is -17/72.
