title: 10 inch tablet with 149 PPI is showing as 160 dpi in program
body: <p>Samsung galaxy 10 inch tablet spec is saying that its display density is 149 PPI.</p>
  
  <p>But when I printed dpi using display metrics its showing  as 160 dpi. </p>
  
  <p>how to know the exact dpi of an devices. </p>