It is a set of three positive integers.
23 is, because it is the most common number in the list.
23, 34, 45, 56
It is: 45/56 times 100 = 80.36% rounded to two decimal places
56-45 = 11
56 x 45 = 2520
45 x 56 = 2520
It is 45/56, which can be simplified, if required.
No - 56/45 = 1.24 recurring (that is, 1.24444..).
23
33
45/56 cannot be simplified.
56 = 2 * 2 * 2 * 7 = 23 * 7