Yes.
7 over 10 can not be reduced!
7 over 80 reduced to in a fraction = 7/80
4/13
7/10 cannot be reduced but can be written as .7 or 70%
28/52 = 7/13
17/52 cannot be reduced further.
It is: 22/52 = 11/27
since 35 = 5 x 7 and 52 = 2 x 2 x 13 they have nothing in common so the answer is No
Yes.
13/52=1/4 since 13x4=52
7 over 10 can not be reduced!
1/13
52/7 = 73/7
13/52 = 1/4 since 13 x 4 = 52.
7 over 80 reduced to in a fraction = 7/80
4/13