Not exactly.
You have a 6.25% chance of getting any of the following:
Pastel Ghosts
Honey Bees
Humble Bees
Ghosts
Pastels
Bees
Spiders
Normals
And a 12.5% chance of getting the following:
Pastels het ghost
Bees het ghost
Spiders het ghost
het ghost
So anything that isn't ghost would be considered 66% het ghost.