31
11 16 added 3 20 equals would be equal to a fraction 67/80.
-2.298 and -8.702 (to 3 dp)
75 added with 20 = 95
There aren't any such numbers. 9 and 20 are 11 apart but cannot be manipulated to give the required solution.
11 over 20 = 11/20 in fraction
That's usually written as 11:20.
20 - 11 = 9
11/20
11 over 20 = 11 ÷ 20 = 0.55
11/20 divded by 9/20 = 11/9
20 - 11 = 9
11 is 55% of 20