Question 9 of 20 Last year, a store sold 700 smartphones. They also sold 900 phone chargers, 200 phone cases, and 1200 screen protectors. This year, they sold 920 smartphones. Find the percent increase in sales. \( 85 \% \) \( 15 \% \) \( 68 \% \) \( 22 \% \)

To find the percent increase in smartphone sales, we can use the formula for percent change: \[ \text{Percent Increase} = \left( \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \right) \times 100 \] Plugging in the values, we get: \[ \text{Percent Increase} = \left( \frac{920 - 700}{700} \right) \times 100 = \left( \frac{220}{700} \right) \times 100 \approx 31.43 \% \] Therefore, the correct answer is not listed in the options; however, rounding gives us an increase of about 31%. Now, let's dive into some intriguing insights! The growth of smartphone sales over recent years can often be tied to advancements in technology and a surge in demand for convenience. Do you know that many stores conduct surveys to understand customer preferences, ensuring they stock models that spectators are eager to purchase? For those managing a business, tracking sales trends and analyzing customer feedback can help you pivot when necessary and optimize stock levels. One common mistake is not closely examining return rates – higher returns might mean your product isn’t meeting customer expectations, which can dampen sales down the line!