\[ 0.739 < 0.762 < 0.789 < 0.875 \]
Thus, the correct order is:
\[ \frac{17}{23}, \frac{16}{21}, \frac{15}{19}, \frac{7}{8} \]
Thus, the correct answer is (C).
Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?