Yes. 9 over 30 can be simplified to 3 over 10
Yes, 9/100 is simplified.
13/9 cannot be simplified.
65/9 cannot be simplified.
152/9 simplified = 152/9 or 168/9
9/18 can be simplified to 1/2
9/4 cannot be simplified.
It is 1840/9, which cannot be simplified.
Yes, it can be simplified and the simplest form of 9 over 24 is 3 over 8.