You're playing a game where you defend your village from an orc invasion. there are 333 characters (elf, hobbit, or human) and 555 defense tools (magic, sword, shield, slingshot, or umbrella) to pick from. if you randomly choose your character and tool, what is the probability that you'll be a magic elf?

There are 111 elf cards out of 333 character cards and you are able to simplify it down to 1/3 and a similar thing can be done for the magic defence this time the simplified answer is 1/5. you can combine the 1/3 and 1/5  only you would need a common denominator. a simple way to do that is by multiplying    the top and the bottom of one fraction with the demonator getting 5/15 and 3/15 when added together is 8/15, your final answer.