2/7 + 1/9
18/63 + 7/63
= 25/63
Then you can simplify if you are asked to. 63 is the Lowest Common Factor (LCM), you need to convert the fraction to the LCM before you can add the fractions.
6/7
((2 plus (1 over 4)) plus 3) plus (7 over 8) = 6.12500
7 over 12
1/8 plus 1/4 plus 1/2 = 7/8 or 0.875
1/2 + 1/7 = 7/14 + 2/14 = 9/14
2/7 + 1/8 = 23/56
1 + 2/7 = 1 2/7
The sum of 7/9 and 1/2 is 1 5/18
1 6over7.
3.65 + 1/2/7 = 3.65 + (1/2)/7 = 3.65 + 0.5/7 = 3.712429 (APPROX).
7 over 2 or 3 and 1/2
1/7 + 2/3 is 17/21