15/43 is simplified.
No.
It is: 24/90 = 4/15 simplified
11/90. It cannot be further simplified.
butthead
15/43 is simplified.
8/43 cannot be simplified.
43 and 25 are coprime so the fraction 43/25 cannot be simplified.
No.
32/43 It cannot be simplified any further, because 32 and 43 have no common factors.
It is: 24/90 = 4/15 simplified
11/90. It cannot be further simplified.
butthead
It is: 90/96 = 15/16 simplified
43/50
49/90 cannot be simplified.
I don't know what it was when it started out. But 43/100 is as simple as it can get.