In a survey, 27% of the people chose salads over a meat dish. in all 81 people chose salads. how many people were in the survey

All that we have to do for this one is we need to take 100/27=3.7 then we need to take 3.7*81=300 because 27%=81 and 27 goes into 100, 3.7 times then we need to take 81*3.7 because of what we already know.
So the answer is in total 300 people where surveyed=)

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