According to the source that says 44% of those killed are children, children make up 47% of Gaza. https://english.wafa.ps/Pages/Details/143002

Also, if it needs to be said, though I hope it doesn't, children make up 0% of valid targets.
0% of the 14467 murdered children were murdered in complaisance with the international law governing war.
0% of the 774 wounded but still living children were wounded in complaisance with the international law governing war.
0% of the 1085 children taken as hostages were victimised in complaisance with the international law governing war.