De or het percussie-instrument?

The correct Dutch article is:

het percussie-instrument

Rule Words ending in -ment: usually het. See the rule

How to use percussie-instrument

the percussie-instrumenthet percussie-instrument
this percussie-instrumentdit percussie-instrument
that percussie-instrumentdat percussie-instrument
our percussie-instrumentons percussie-instrument
your percussie-instrumentjouw percussie-instrument
every percussie-instrumentelk percussie-instrument
which percussie-instrument?welk percussie-instrument?
a big percussie-instrument / the big percussie-instrumenteen groot percussie-instrument, het grote percussie-instrument