anonymous
  • anonymous
A newborn baby's heart weighs approximately 20 grams. An adults heart weighs about 300 grams. As a grows into an adult, by what precent does the baby's heart increase in weight ? PLZ HELP!!!
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
@Halia subtract 300 from 20.
anonymous
  • anonymous
anonymous
  • anonymous
I did that @AliceCullen & I got 280 what should I do now ?

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anonymous
  • anonymous
That's your answer.
mathstudent55
  • mathstudent55
Percent change formula: \(percent~change = \dfrac{new ~number - old ~number}{old~number} \times 100\)
mathstudent55
  • mathstudent55
280 is just the change, not the percent change. 280 is only the numerator of the percent change formula. Now divide by the old number (20 grams) and multiply by 100 to find the percent change.
mathstudent55
  • mathstudent55
Also, it's "subtract 20 from 300", not "subtract 300 from 20".
anonymous
  • anonymous
@mathstudent55 should I divide 20 from 280 ???

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