1. **Problem:** What percent of 50 is 18? 2. **Formula:** To find what percent $p$ of a number $N$ is another number $x$, use the formula: $$p = \frac{x}{N} \times 100$$ 3. **Apply the formula:** Here, $x = 18$ and $N = 50$. $$p = \frac{18}{50} \times 100$$ 4. **Calculate the fraction:** $$\frac{18}{50} = \frac{\cancel{18}}{\cancel{50}} = \frac{9}{25}$$ 5. **Convert to decimal and multiply by 100:** $$\frac{9}{25} = 0.36$$ $$0.36 \times 100 = 36$$ 6. **Answer:** 18 is 36% of 50.