title: How to calculate market share in tableau
body: <p>I have a data set for 10 countries. Each country has more than 8 products and my company has 3 products A,B,C which are sold in each of the country.</p>
  
  <p>So Now, I want to calculate the market share for my products country wise.</p>
  
  <p>for E.g. If total sale for 8 products in country 1 is 100 and sale for products A+B+C is 35, then market share of my company in country1 is 35/100= 35%
  .</p>
  
  <p>Please help !</p>