Let there are x glass figurinesin room. as museum decided to showcase in total 9 different room as total number of glass figurines are:

Determine the number of glass figurines in 7 rooms.

The total collections is of 9x glass figurines.
In 7 rooms the collections appear is 7x.
Determine the fraction of collection that will appear in 7 rooms.

So, the answer is 7/9.