23 / 55 = 23 / (5 * 11) is already reduced (simplified) to lowest terms, numerator and denominator are coprime numbers.
3/5 is simplified by 33/55
23 over 100 is not simplified
55/72
no
No.
It is 11/12 when simplified (divide both the 55 and 60 by 5).
55/11 = 5
It is: 55/990 = 1/18
23/40 is already simplified to its lowest terms
23/80 cannot be simplified further.
42/55 is already simplified.
18/55 is in its simplest form