6/7
How to work the problem:
When adding fractions, you first find the lowest common denominator,then add the neumerators. Since you already havethe LCD(both are7), you simply add 3 + 3 over 7, which = 6. So the answer is 6/7.
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6/7
((2 plus (1 over 4)) plus 3) plus (7 over 8) = 6.12500
2 over 7 + 3 over 7= 5 over 7
1/5 plus 1/7 plus 3/10 is equal to 0.642857
It is 9/8 plus 7/3 = 83/24