No, the two numbers are relatively prime (or coprime).
5/8
45/72 = 5/8 reduced
The ratio is 8:45, which cannot be reduced.
The fraction 45 over 8 is in its simplest form since 45 and 8 have not common factor. 45/8 can be written as a mixed number, 5 5/8
Yes, it is reduced from 195/45 to 39/9
17/45.
No it cannot be further reduced.
No.
If you mean 45/72 then it is 5/8
45/96 = 15/32
10/45 = 2/9
Yes.