Water tank \(A\) contains \(0.3125\) of its total capacity as water, while water tank \(B\) contains \(\frac{3}{8}\) of its total capacity. Convert both as percentages, calculate which tank holds the greater proportion of water, and find the percentage-point difference between the two proportions.
The tank holding the greater proportion of water is
The percentage-point difference between the two proportions is \(\%\).
(Note: If the answer is a whole number, enter it as it is; if not, round off to \(2\) decimal places)