Room spray how to mix

If doing 250ml bottle size

75ml fragrance
10ml fixative
165ml base

If doing 100ml

30ml fragrance
4ml fixative
66ml base

That’s 30% frag
4% gold base fixative
66% base

Can reduce the fragrance to 15 or 20 cause 30 very loud and when reduce means add the extra that comes off to the base