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Question

What percent is $$9$$ out of $$20$$?


Solution

$$9$$ out of $$20=45 \%$$


Explanation:


"Perçent" or "$$\%$$" means "out of $$100 "$$ or "per $$100^{\prime
\prime}$$, Therefore $$x \%$$ can be written as $$\frac{x}{100}$$


We can write and solve this as:

$$\frac{x}{100}=\frac{9}{20}$$


$$\therefore 100 \times \frac{x}{100}=100 \times \frac{9}{20}$$


$$\therefore x=5\times 9$$

$$\therefore x=45\%$$


Thus, 9 out of $$20=45\%$$


Mathematics

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