$$ \begin{aligned} x &= \frac{1199}{100}\cdot1&& \text{multiply ALL terms by } \color{blue}{ 100 }. \\[1 em]100x &= 100 \cdot \frac{1199}{100}\cdot1&& \text{cancel out the denominators} \\[1 em]100x &= 1199&& \text{ divide both sides by $ 100 $ } \\[1 em]x &= \frac{1199}{100}&& \\[1 em] \end{aligned} $$
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