Question
$$\frac{x}{25} = \frac{68}{100}$$
Answer
$$ x = 17 $$
Explanation
$$ \begin{aligned} \frac{x}{25} &= \frac{68}{100}&& \text{multiply ALL terms by } \color{blue}{ 100 }. \\[1 em]100 \cdot \frac{x}{25} &= 100\cdot\frac{68}{100}&& \text{cancel out the denominators} \\[1 em]4x &= 68&& \text{ divide both sides by $ 4 $ } \\[1 em]x &= \frac{68}{4}&& \\[1 em]x &= 17&& \\[1 em] \end{aligned} $$
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