2/7+1/7 = 3/7.

2/7 + 1/7 = (?)

2/7 + 1/7 = (2 + 1)/7

= 3/7

2/7 + 1/7 = 3/7

2/7 is a fraction as an addend,

1/7 is a fraction as an addend,

3/7 is the sum of 2/7 and 1/7.

2/7 + 1/7 = 3/7

3/7 = 0.4286

2/7+1/7 as a decimal is 0.4286

0.4286 is the sum of 2/7 and 1/7.