Answer:
61.3% called room service
38.7% did not
Explanation:
To find the percentage of people that called room service, you must first find the total number of people. Find this by adding 280+177, which equals 457. Then, find what percent of 457 is 280. Do this by dividing part by whole, which looks like 280/457. Next, multiply this answer by 100 to get the percentage of 61.3%.
If you want to find what percent did not call room service, you can do this process again but with 177. The other option is to simply find 100-61.3%. All percentages sum to 100, so to find the missing percentage you can use subtraction. 100-61.3=38.7%.