In a dinner, #27%# people chose salad. If #81# persons chose salad, how many people were there?

1 Answer
hectoroftroy
Dec 14, 2016

300 people.

Explanation:

Treat it as a proportion:

#"people who chose salad" / "percent who chose salad" = "all people" / "100%"#

Cross multiply:

#"people who chose salad" * "100%" = "percent who chose salad" * "all people"#

Put in the numbers:

#81 * 1 = 0.27 * "all people"#

#81 / 0.27 = "all people"#

#300 = "all people"#

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