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!!!

Question

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!!!

anonymous · Answer

@Halia subtract 300 from 20.

anonymous · Answer

Kk @AliceCullen

anonymous · Answer

I did that @AliceCullen & I got 280 what should I do now ?

anonymous · Answer

That's your answer.

mathstudent55 · Answer

Percent change formula:

$percent~change = \dfrac{new ~number - old ~number}{old~number} \times 100$

mathstudent55 · Answer

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 · Answer

Also, it's "subtract 20 from 300", not "subtract 300 from 20".

anonymous · Answer

@mathstudent55 should I divide 20 from 280 ???