It is 4/9.
Since the numerator of the fraction 19/36 is prime, the fraction cannot be simplified any further.
16/36 = 4/9
Yes
6/36 = 1/6
80 over 36 simplified: 20 over 9 and as a mixed number it's 2 2/9
Yes.
3/4
It is: 36/84 = 3/7 simplified
7/12
Yes, to: 1 36/53
It is: 27/36 = 3/4 simplified
Oh, dude, you want a simplified fraction? Like, 28 over 36 is the same as 7 over 9. You just divide both numbers by 4, and voila, you got yourself a simpler fraction. Math can be chill sometimes, right?