$$ \begin{aligned} \frac{\frac{100\cdot\frac{6}{100}}{12}}{1-\frac{1}{(1+\frac{6}{100}\cdot12)^{60}}} &= 0&& \text{multiply ALL terms by } \color{blue}{ 0 }. \\[1 em]0 \cdot \frac{\frac{100\cdot\frac{6}{100}}{12}}{1-\frac{1}{(1+\frac{6}{100}\cdot12)^{60}}} &= 0\cdot0&& \text{cancel out the denominators} \\[1 em]\frac{1}{2} &= 0&& \\[1 em] \end{aligned} $$

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