11.5 = 23/2
23+23 is an integer, not a fraction.
23 into a fraction = 23/1
23 to fraction = 23/1
23% as a fraction is 23/100
point 23 as a fraction = 23/1000.23 * 100/100 = 23/100 in fraction
23% = 23/100 as a fraction
23% = 23/100 in fraction
23 as a fraction of 100 = 23/100
The fraction 21/23 cannot be simplified. You could muliply both of them by the same number, and get a fraction like 42/46, but it's better to keep fractions simplified.
11 and a half
23 is an integer, not a fraction.