A ball with a mass of $0.50\,\text{kg}$ and a volume of $1.3 \times 10^{-3}\,\text{m}^3$ is floating in equilibrium on still water. The two forces acting on the ball are its weight and the upthrust due to the water. The density of the water is $1.0 \times 10^3\,\text{kg m}^{-3}$. Calculate the percentage of the ball's volume that is above the water surface.
- A$3.9\%$
- B$38\%$
- C$62\%$
- D$96\%$