Mark and James need a total of 14 dice that are 12 sided to play their game.  Mark has a bag of 10 dice and 60% of them are 12 sided.  James has a bag of 8 dice and 75% of them are 12 sided.  How many dice will the boys need to buy to play their game?
Mark has 60% 12 sided dice, so 60/100 * 10 dice in his bag = 
<gadget id="calculator">60/100*10</gadget>
<output>6</output>
6 12 sided dice.
James has 75% 12 sided dice, so 75/100 * 8 dice in his bag = 
<gadget id="calculator">75/100*8</gadget>
<output>6</output>
6 12 sided dice.
They will need to purchase 14 dice - 6 dice - 6 dice = 
<gadget id="calculator">14-6-6</gadget>
<output>2</output>
2 dice.

<result>2</result>