title: Need to remove the string chr and the % sign from the file
body: <p>I have a file which looks like below</p>
  
  <pre><code>chrM    152 165 45  21.43%
  chrM    13811   324 70  17.77%
  chr1    1669566 47  14  22.95%
  chr1    1685929 144 33  18.64%
  </code></pre>
  
  <p>I want to remove the string <code>chr</code> and the <code>%</code> sign from the file. This is a <code>tab</code> delimited file. How should I use the <code>sed</code> command here?</p>
  
  <p>my output should be :</p>
  
  <pre><code>M   152 165 45  21.43
  M   13811   324 70  17.77
  1   1669566 47  14  22.95
  1   1685929 144 33  18.64
  </code></pre>