$$ \begin{aligned} 1350+8 \cdot \frac{s}{100} &= 1652&& \text{multiply ALL terms by } \color{blue}{ 100 }. \\[1 em]100\cdot1350+100\cdot8 \cdot \frac{s}{100} &= 100\cdot1652&& \text{cancel out the denominators} \\[1 em]135000+8s &= 165200&& \text{ move 135000 to the right } \\[1 em]8s &= 165200-135000&& \\[1 em]8s &= 30200&& \text{ divide both sides by $ 8 $ } \\[1 em]s &= \frac{30200}{8}&& \\[1 em]s &= 3775&& \\[1 em] \end{aligned} $$

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