The two denominators (9 and 7) have no common factors besides 1, so the least common denominator is their product, 63. So we have 4/9 is 28/63, and 5/7 is 45/63. The numerators add up to 68, so we get 68/63, which is 1 5/63, which is already in lowest terms.
55 over 63. Use a calculator.
28/63
It is: 15/9 or1 and 2/3
13/14
1 and 1 ninths
32/27
Nine sevenths, or one and two sevenths.
55 over 63. Use a calculator.
28/63
It is: 15/9 or1 and 2/3
13/14
1 29/63
1 and 1 ninths
10/9
2
five seventh
1 whole