the ratio of the number of adults to the number of students at the prom has to be 1:10 last year there were 477 more students than adults at the prom if the school is expecting the same attendance this year how many adults attended the prom

Answer 1

number of adults --- x
number of students --- 10x , (note that x : 10x = 1 : 10)

10x - x = 477
9x = 477
x = 53

so 53 adults attended and 530 students

check: is 530-53 = 477 ? sure is!