120 hotdogs would be served if 150 people attend the party.
A ratio is the quantitative relationship between two value, showing how many times one number contains another.
The ratio of hot dogs purchased to number of guests is 1:0.8. For 150 people:
Number of hotdogs = 150 * 0.8/1 = 120 hotdogs
Therefore 120 hotdogs would be served if 150 people attend the party.
Find out more on Ratio at: https://brainly.com/question/2328454