The average of the weights of boys in a class is 69.3 kg and that of girls in the same class is 59.4 kg. If the average of the weight of all the boys and girls in the class is 63.8 kg, then the percentage of the number of girls in the class is:

• A. \(44 \dfrac{5}{9}\%\)
• B. \(45 \dfrac{5}{9}\%\)
• C. \(55 \dfrac{5}{9}\%\)
• D. \(54 \dfrac{5}{9}\%\)