At least 50% to prevent shutdown during the process.
: This is the final major release compatible with Jelly Bean (4.2+) and KitKat (4.4). download magisk manager for android 4.4.2
Many devices from that era (like the Samsung Galaxy S4 or Nexus 5) have dedicated "One-Click" root tools or specific scripts available on developer forums. Important Safety Warning At least 50% to prevent shutdown during the process