No
121/999 is as simple as it gets.
0.1211
Their GCF is 1.The factors of 121 are 1, 11, and 121.The factors of 999 are 1, 3, 9, 27, 37, 111, 333, and 999.The only common factor, and thus the greatest common factor, is 1.
It doesn't reduce.
The greatest common factor of 77 and 121 is 11, so you can reduce the fraction 77/121 by dividing both the numerator and denominator by 11 to get 7/11.
33 over 33 is 1 and 999 over 999 is 1, so yes, they are equal.
Basically every "counting number" between 100 and 999 like 101, for example.
Since the numerator and denominator are the same, 999/999 is equal to 1.
6 over 999 simplified is 2/333
there are many symmetric numbers. 111, 121, 454, 252, 999, 545 etc
121/100 = 121/100
897/999 = 299/333