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OpenStudy (thefluffmuncher):
Myra’s stamp collection consisted of 120 stamps in October. By the following March, her collection had grown to 138 stamps. By how much did her collection increase between October and March? A. 15% B. 12% C. 9% D. 18%
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OpenStudy (anonymous):
Start with figuring out how many stamps she gained, then figure out what percentage that number is of her previous total.
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