10 is 20% of what number?

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10 is 20% of what number?

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Answer 1 · 2016-12-31T11:57:17

If we know that $10 \leftrightarrow 20 %$ $10harr20%$ then what $\leftrightarrow 100 %$ $harr100%$

Explanation:

$10 \leftrightarrow 20 % = X \leftrightarrow 100 %$ $10harr20%=Xharr100%$ , or:

$\frac{10}{20 %} = \frac{X}{100 %}$ $10/(20%)=X/(100%)$

You may multiply the left part by $1$ $1$ , disguised as $\frac{5}{5}$ $5/5$ :

$\frac{5 \times 10}{5 \times 20 %} = \frac{X}{100 %} \to \frac{50}{100 %} = \frac{X}{100 %} \to X = 50$ $(5xx10)/(5xx20%)=X/(100%)->50/(100%)=X/(100%)->X=50$

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10 is 20% of what number?

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