Yes. It should be trivially obvious that both those numbers are divisible by 3, which would be a good place to start.
Yes and it is: 5/12
105/180 = 21/36 = 7/12
Yes. It is 21/20.
11/132 = 1/12
33 goes into 99 3 times and 33 goes into 132 4 times, so 99/132 is (33x3)/(33x4)=3/4 after cancellation.
Yes: 42/105 = 2/5
Yes and it is: 5/12
105/180 = 21/36 = 7/12
Yes. It is 21/20.
0.7955
If you simplify it, it's 105 and 3/4 (<--fraction).
The greatest common factor of 105 and 132 is 3.
11/132 = 1/12
33 goes into 99 3 times and 33 goes into 132 4 times, so 99/132 is (33x3)/(33x4)=3/4 after cancellation.
Divide the numerator and denominator by their greatest common factor, which is 5. Thus, 80/105 = 16/21
No. Nobody can.
105/112 = 15/16