3 x (7/9+1/3) +4/7

Question

3 x (7/9 +1/3) + 4/7 

Answer 1

Assuming that you mean that you want to simplify 3(7/9+1/3) +4/7, just distribute:

21/9 + 1 + 4/7 = 7/3 + 1 + 4/7 

so we'll get a common denominator & proceed:

(49 + 21 + 12) / 21 = 82/21 = about 3.905, rounding to 3 decimal places.