9/13 is already as simplified as it is going to get because 13 is prime.
It is: 26/18 = 13/9
9 over 13 NO! 9/7 * 9/6 = 9/7 * 3/2 = 27/14 which can be simplified to 113/14 At the second stage 9/6 was simplified to 3/2 using the common factor 3.
9/9 simplified is 1
It can not be simplified further.
Yes, it is simplified.
It is already simplified.
-13/72 cannot be simplified.
13/100 cannot be further simplified.
Yes. 9 over 30 can be simplified to 3 over 10
Yes, 9/100 is simplified.
65/9 cannot be simplified.