1. The problem asks for the probability of spinning a number less than 8 on a spinner divided into 8 equal sectors labeled 1 through 8. 2. Since the spinner has 8 equal sectors, each sector has a probability of $\frac{1}{8}$. 3. The numbers less than 8 are 1, 2, 3, 4, 5, 6, and 7, which is 7 sectors. 4. Therefore, the probability $P(\text{less than } 8) = \frac{7}{8}$. 5. Calculate $\frac{7}{8} = 0.875$ or 87.5%. 6. Among the given options, 85.9% and 85.7% are closest to 87.5%, with 85.9% being the closest. Final answer: $P(\text{less than } 8) \approx 85.9\%$.