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Add 3/8 and (-5)/(12)...

Add `3/8` and `(-5)/(12)`

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Add `frac{3}{8}+frac{-5}{12}`
Taking `24` as LCM of the denominators and then add both numerators`=frac{ 3xx3+(-5xx2)}{24}`
`=frac{9-10}{24}`
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