The ratio of students to teachers at a school is 19:1. At this school, there are 400 people (teachers and students). How many of these 400 people are students? (enter the number only, without the unit)

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Can someone me out here and the tell me the greatest common factor

15/16 as a decimal rounded to the nearest hundredth