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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

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  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!

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