Final fraction of water by mass as a function of the final mass of the class A HZ planets (left panel) and class B HZ planets (right panel). The red filled circles illustrate the values associated with those planets formed in simulations without fragmentation, while the open and filled blue circles represent the values obtained from Models 1 and 2 in runs with fragmentation, respectively. In both panels, the black solid line represents the initial water fraction for class A and class B HZ planets.