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Haley has a collection of necklaces. Lastmonth, she had 40 necklaces. She now has72 necklaces. What is the percent changein the number of necklaces in Haley'scollection from last month to now?

Respuesta :

40 necklaces before

72 necklaces now

40 ------------------------- 100%

72 ------------------------- x

x = (72 x 100)/40

x = 7200/40

x = 180%

Result = 180%

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