Of the 140 people attending a movie theater 91 bought buttered popcorn. what percent bought buttered popcorn?

To find the percentage of people who bought buttered popcorn, divide the number of people who bought it (91) by the total number of attendees (140) and then multiply by 100.

[ \text{Percentage} = \left( \frac{91}{140} \right) \times 100 \approx 65% ]

Therefore, approximately 65% of the attendees bought buttered popcorn.