****** QUANTIFIERS are all underlyingly of the form {N fi'u D}. If D is {ro(PA)} then Q means "N out of all PA things that are broda". If D is not {ro(PA)} then ro is still the number of things that are broda, but Q means "N in every D things that are broda".
Q can be expanded to ( N / D ) * (ro)C "N in every D of all C=ro things that are broda."
... but I'm not sure how best to Lojban that.
In XS there is no place for (ro)C, so you have to use double gadri: {ci fi'u mu loi ropanono loi pa broda} = "3/5 of the all 100 single broda".