De or het schuldvermindering?

The correct Dutch article is:

de schuldvermindering

Rule Words ending in -ing: almost always de. See the rule

How to use schuldvermindering

the schuldverminderingde schuldvermindering
this schuldverminderingdeze schuldvermindering
that schuldverminderingdie schuldvermindering
our schuldverminderingonze schuldvermindering
your schuldverminderingjouw schuldvermindering
every schuldverminderingelke schuldvermindering
which schuldvermindering?welke schuldvermindering?
a big schuldvermindering / the big schuldverminderingeen grote schuldvermindering, de grote schuldvermindering