1/12 plus 2/3? The answer is 9/12 or 3/4. To easily add fractions, get to a common denominator; the common denominator here is 12; multiply 2/3 by 4/4 to get 8/12. From there the addition of the top numbers is simple, 8+1=9, hence 9/12. 9 and 12 can each be divided by 3, so divide 9/12 by 3/3 to get 3/4. (this is reducing)
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1/12 + 1/12 = 2/12 or 1/6 in its simplest form
Expressed as a mixed number in its simplest form, 2 1/3 + 1 3/4 = 4 1/12 or four and one twelfth. Expressed as a decimal, this is equal to 4.083 recurring (that is, 4.083333...)
The answer is 2/5 plus 1/3 = 11/15
1 and 1/2
1/2 + 1/3 + 1/3 = 3/6 + 2/6 + 2/6 = 7/6 or 1 1/6