SOLUTION: If the ratio of children to adults is 5:7 5 : 7 and there are 100 100 children at an arts festival, how many adults are in attendance?

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Question 1140092: If the ratio of children to adults is 5:7
5
:
7
and there are 100
100
children at an arts festival, how many adults are in attendance?
Answer by ikleyn(52847) About Me  (Show Source):
You can put this solution on YOUR website!
.
You are told that the proportion takes place


    children%2Fadults = 5%2F7


and that  the number of children is 100.


So you can write


    100%2Fadults = 5%2F7.


From this proportion,


    number of adults = %28100%2A7%29%2F5 = 20*7 = 140.    ANSWER

Solved.

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