Adam could fit 10 action figures on each shelf in his room. His room has could hold 8 action figures. How many total shelves did his room have?
Let's say that the number of shelves in the room is $x$. Then we know that:
$$10x \leq 8x$$
$$x \leq \frac{8}{10}x$$
$$x \leq \frac{8}{10} \cdot \frac{10}{10}x$$
$$x \leq \frac{8}{10} \cdot \frac{10}{10} \cdot \frac{100}{100}x$$
$$x \leq \frac{8}{10} \cdot \frac{10}{10} \cdot \frac{100}{100} \cdot \frac{1000}{1000}x$$
$$x \leq \frac{8}{10} \cdot \frac{10}{10} \cdot \frac{100}{100} \cdot \frac{1000}{1000} \cdot \frac{10000}{10000}x$$
$$x \leq \frac{8}{10} \cdot \frac{10}{10} \cdot \frac{100}{100} \cdot \frac{1000}{1000} \cdot \frac{