-4
4/5+2/7=38/35 which is equal to 1 and 3/35
1
3 sevenths
two and 3 fifths
1
28/63
3/7 + 4/7 = 7/7 = 1
(3/5)+(3/5)+(3/5) = 9/5 = 1 and 4/5
5/7, 1/2, 3/5 LCM is 70
2 and 6/5 or 3 and 1/5
Expressed as a decimal, 5 4/5 + (-3 2/7) = 2.5142857 recurring (that is, 2.5142857142857...)
3/5 + 7/8 + 6/7 = 2 93/280