15% of 80 is what?

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15% of 80 is what?

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Answer 1 · 2016-11-17T16:51:22

$12$ $12$ is $15 %$ $15%$ of $80$ $80$ . See Explanation.

Explanation:

See what is asked
So we are asked what $15 %$ $15%$ of $80$ $80$ is.
Figure out "plan of attack"
So the best way that there seems to be to solve this problem is making a proportion.
Solve
$x$ $x$ is to $80$ $80$ as
$15$ $15$ is to $100$ $100$

(We are using $100$ $100$ because $15 %$ $15 %$ is out of $100 %$ $100 %$ )
Cross multiply
$x$ $x$ $\cdot$ $*$ $100 = 15$ $100 = 15$ $\times$ $xx$ $80$ $80$
Carry out what multiplication that can be done
$100 x$ $100x$ $=$ $=$ $1, 200$ $1,200$
Divide both sides by $100$ $100$
$x$ $x$ $=$ $=$ $12$ $12$
And there is your answer, $12$ $12$ .
$12$ $12$ is $15 %$ $15%$ of $80$ $80$

You can double check your answer by plugging these numbers, including $12$ $12$ , back into the proportion.

$12$ $12$ is to $80$ $80$ as
$15$ $15$ is to $100$ $100$
$12 \times 100$ $12 xx 100$ $=$ $=$ $80 \times 15$ $80 xx 15$
✅ $1, 200 = 1, 200$ $1,200 = 1,200$ ✅

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15% of 80 is what?

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