Divide the total cost by the number of shares. Five Powerball tickets at $2 cost $10; split in 4 equal shares, each is $2.50. When the division does not come out even, such as $10 in 3 shares ($3.3333...), the calculator works in cents: 1,000 cents divided by 3 is 333 each with 1 left over, so one person pays $3.34 and two pay $3.33, adding up to exactly $10.00.