42/14 = 3
9/42=
Yes.
You change it into a fraction form ( 42 over 100) and reduce.
(42/5)/(35/9)=(42/5)x(9/35)=378/175
42/27 = 14/9 = 15/9
42/9 = 4 and 2/3
6/7
Yes, it reduces to 2/5
42/54 = 7/9
42/9 is much greater. 42/9 is the same as 4 and 7/9 (since 9 goes into 42 4 times with 7 left over). Since 5/9 is less than 1, clearly 42/9 is much greater. 7/9 alone would still be greater than 5/9. But since it's not just 7/9, but 4 and 7/9, it is obviously greater than 5/9.
No.