Problem
A child went for his yearly physical examination. Last year he measured 39 inches tall, and this year he measured 43 inches tall. What is the percent of increase in his height? The percent increase is \( \% \) (Simplify your answer. Type an integer or decimal rounded to the nearest tenth as needed.)
Solution
Step 1 ：\(\text{Percent Increase} = \frac{\text{New Height} - \text{Old Height}}{\text{Old Height}} \times 100\)
Step 2 ：\(\text{Percent Increase} = \frac{43 - 39}{39} \times 100\)
Step 3 ：\(\text{Percent Increase} = 10.3 \%\)
