Chloe and Dan have a total of 500 trading cards. The ratio of the number of cards Chloe has to the number of cards Dan has is 13:7 13 : 7\,13:7
Chloe gives Dan some of her cards. The ratio of the number of cards Chloe has to the number of cards Dan has is now 3:2 3 : 2\,3:2
Work out how many cards Chloe gives to Dan. You must show all your working.
