1. **State the problem:** We need to find the percentage decrease in the world record time between February 2013 and March 2013. 2. **Convert times to seconds:** - February 2013: 6 min 10 sec = $6 \times 60 + 10 = 370$ seconds - March 2013: 5 min 17 sec = $5 \times 60 + 17 = 317$ seconds 3. **Formula for percentage decrease:** $$\text{Percentage decrease} = \frac{\text{Old value} - \text{New value}}{\text{Old value}} \times 100$$ 4. **Calculate the difference:** $$370 - 317 = 53$$ seconds 5. **Calculate the percentage decrease:** $$\frac{53}{370} \times 100 = \frac{53}{\cancel{370}} \times 100 = \frac{53}{\cancel{370}} \times 100 \approx 14.32\%$$ 6. **Round to nearest 1%:** $$14.32\% \approx 14\%$$ **Final answer:** The world record time decreased by approximately 14% between February 2013 and March 2013.