Word Problem - Can't figure this one out

[gmat_killer]

Does anyone know how to solve this? I can't seem to figure it out... Thanks!!

Of the 500 business people surveyed, 78 percent said that they use their laptop computers at home, 65 percent said that they use them in hotels, and 52 percent said that they use them both at home and in hotels. How many of the business people surveyed said that they do not use their laptop computers either at home or in hotels?

A. 45
B. 55
C. 65
D. 95
E. 130

[ssmiles08]

IMO A

This is a set theory problem. So I set up a chart.

9% use laptops neither at home nor at a hotel

9% of 500 = 45

[gmat_killer]

thank you sooo much! you make it so easy!