Not sure about "simplified", but I would hazard a guess and go for d3.
The Teichholz formula is: Volume = 7D3/(2.4+D) (D3 is DxDxD, or D-cubed).
7/30 cannot be simplified.7/30 cannot be simplified.7/30 cannot be simplified.7/30 cannot be simplified.
It can not be simplified further.
3/4 cannot be simplified further.3/4 cannot be simplified further.3/4 cannot be simplified further.3/4 cannot be simplified further.
116/15 cannot be simplified further.116/15 cannot be simplified further.116/15 cannot be simplified further.116/15 cannot be simplified further.
115/12 cannot be simplified.115/12 cannot be simplified.115/12 cannot be simplified.115/12 cannot be simplified.
If you mean 7200/6400 then it is 9/8 simplified
It is simplified.
No it can not be simplified
10.9 cannot be simplified.
67.5 cannot be simplified.
it is already simplified