Question
Zeph bought 3 bags of postcards. In each bag, there were 10 postcards. He used 3 of the postcards and gave some of them to his cousin. 15 of his postcards were then left. What fraction of the postcards he bought were given to his cousin?
4 m

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Zeph bought 3 bags of postcards. In each bag, there were 10 postcards. He used 3 of the postcards and gave some of them to his cousin. 15 of his postcards were then left. What fraction of the postcards he bought were given to his cousin?