In 2011. Dagan had a collection of 30 music CDs. Since then they have given away 2 CDs and purchased new CDs. Since 2011. what has been the percent increase in the number of CDs in Dagan's collection?

1 answer

missing data.

let the number of new CD's be x

so new collection = 30 - 2 + x = x + 28

percentage increase = (x+28)/30 * 100 %

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