More than 50% of businesses in London (75,000 in total) say they will attend, and 25% of businesses outside the capital (279,000).
Some 81% of London's business community thinks the Games will have a positive impact on east London, and 77% nationwide have the same sentiment.
Continental Research polled 991 UK adults and 500 senior business people and also found 72% of adults thought the Games will have a positive impact on east London; 68% of Londoners were also positive.
Overall, 73% planned to watch the Games on TV.