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The brain mass of a newborn baby is about 13% of its body mass. If a new born has a body mass of 2900 grams, about how much is the mass of its brain?



Answer :

Answer:

377 grams

Step-by-step explanation:

What we are really trying to figure out is 13 percent of 2900.

So we can use the equation:

13/100 = x/2900

where 13 is the percent out of 100 and 2900 is the total. We are trying to find x which is the equivalent of 13 percent. To solve we must cross multiply and we get 100x = 37700. When we divide by 100 we get 377 which means 13 % of 2900 is 377.

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