One-third plus three-ninths is 2/3.7/9
It is 2 2/3
1 and 1 over 16
three fourths plus one third is 13 over 12. But if want to put it into a mixed number it is 11/12.
4
Three plus seven equals ten.
Seven and one twelfth
13 and 1/12
fifty-three over fifty-six
one and seven over twenty 1 7/20
2/7 + 3/7 is 5/7, which can't be simplified.
Three thirds