4
If you mean 4/16 then it is 1/4
If you mean 3 12 then yes it is equivalent to 1 4
If you mean 64 and 16 then it is 4 to 1
If you mean: 4 and 20 then the ratio is 1 to 5
If you mean: 24 96 then its ratio is 1 to 4
4
If you mean 3/4 then it is 6/8
If you mean 4/16 then it is 1/4
If you mean 3 12 then yes it is equivalent to 1 4
If you mean 64 and 16 then it is 4 to 1
Do you mean the molecular formula? If so, then it is C4H10. If you mean empirical formula, then it is C2H5.
If you mean: 4 and 20 then the ratio is 1 to 5
If you mean: 5 20 then it is 1 4
If you mean 9 and 12 then it is 3 and 4
If you mean 9 12 then it is 3 4
If you mean 27/36 then it is 3/4 reduced