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

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Answer 1 · 2016-12-14T03:32:41

300 people.

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:

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

$81 / 0.27 = "all people"$

$300 = "all people"$

In a dinner, 27%27% people chose salad. If 8181 persons chose salad, how many people were there?