720 companies total
8 winners
8/720 reduced is 1/90. So the probabilty of a company winning will either be 8 /720 or 1/90, I would go with 1/90 personally but this is up to you.
Part two:
2 companies get hospitality suite. There 8 total. Thats 2/8 reduced is 1/4. 1/4 as a percent is 25%
I'm not totally sure about these but I am pretty sure that these would be correct.