Step 1: Concept
First, write the formula for probability
[tex]\text{Probability of any event = }\frac{N\text{umber of required outcomes}}{N\text{umber of total possible outcomes}}[/tex]Step 2: Write out the given data.
7.3% of Americans plans to travel by car over the next holiday weekend
82.2% plans to stay-at-home.
Total possible outcomes = 100%
Step 3: Final answer
A number of required outcomes = Stay at home or travel by car over the next holiday weekend
= 7.3 + 82.2
= 89.5%
[tex]\begin{gathered} \text{Probability = }\frac{89.5}{100} \\ =\text{ 0.895} \end{gathered}[/tex]