28.2.3 declension
of the interrogative pronoun wieviel
The interrogative pronoun wieviel
can refer to a part of a quantity or to a member of a
group. If wieviel refers
to a part of a quantity (in meaning of How much?) it is
never declined.
Some examples
Wieviel Mehl
willst du?
= How much flour do you want?
Wieviel Geld
brauchst du?
= How much money do you need?
Von wieviel
Mehl träumt
er?
= Of how much flour does he dream?
Von wieviel
Geld träumt er?
= Of how much money does he dream?
If wieviele refers to
a member of a group (in meaning of How many?) the number,
the gender and the declension of wieviele
have to correspond. Wieviele
is logically always plural. In plural there is no difference
between feminine, neutral and masculine nouns. There are
in Accusative / Nominative and in Dative / Genitive.