De or het winstraming?

The correct Dutch article is:

de winstraming

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

How to use winstraming

the winstramingde winstraming
this winstramingdeze winstraming
that winstramingdie winstraming
our winstramingonze winstraming
your winstramingjouw winstraming
every winstramingelke winstraming
which winstraming?welke winstraming?
a big winstraming / the big winstramingeen grote winstraming, de grote winstraming