A Survey of 9,000 Heads of Household Asked the Following

A survey of 9,000 heads of household asked the following questions:
Check the box if the answer is "yes".
, My household has an Internet connection.
, Someone in my household has a cell phone.
If 4,350 of the households checked the first box, what percentage of the respondents have an Internet connection?
__________% have an internet connection
If 3,450 of the households checked the second box, what percentage of the respondents have a cell phone?
__________% have a cell phone
If 200 checked both boxes, what percentage of the households have both an Internet connection and a cell phone?
__________% have an internet connection and a cell phone
What percentage of the households have an Internet connection or a cell phone?
__________% have an internet connection or a cell phone
Round your answers to the nearest tenth of a percent.