Reflections tax in decimals

Can we set reflection tax fee in decimals like 1.5, 0.20 or 0.26

1.5% is 15/1000, 0.2% is 2/1000 and 0.26% is 26/10000

But how to set it should I just write 15/1000 in the code?

You can set fees in hundredth by dividing rates by 100 or in thousandth by dividing rates by 1000, so on and so forth.