Use the rules for long division to divide 724 by11

                 __ ← that is a bar representing that it is ongoing. 
724/11=65.81
            __
     x65.81            1)11 cannot go into 7 so u put a x 
              2)72 goes in 11 6 times so u put 6 next to x
11 | 724.00           3)6 times 11 is 66
    -66↓ ↓ ↓           4)subtract 66 by 72 and get 6
     __↓ ↓ ↓           5)bring down the 4 and put it next to the 6 getting 64.
       64 ↓ ↓           6)64 goes into 11 5 times
      -55 ↓ ↓           7)put the five next to the x6
      ___↓ ↓           8)11 times 5 is 55        
          90 ↓           9)subtract 55 from 64 and get 9  
         -88 ↓           10)bring the decimal up
        ___ ↓           11)gring down the zero *remember*:*a zero has unlimited 
             20               zeros*
              -11           12)90 goes into 11 8 times so put a 8 next to x65.
             __            13)11 times 8 is 88
               9            14)subtract 90 from 88 and get 2   
                             15)bring down another zero
                             16)20 goes into 11 1 time so put a one next to x65.8
                             17)subtract 11 from 20 and get 9
                             18)it is not ongoing so put a bar over the answer
                            __ 
the answer is 65.81 or u can round it, 65.8182

6/ 11 = 0.545454 so your answer is55%

How many shares did he have to begin with?