Math CentralQuandaries & Queries


Question from Bobby:

What percent is 50 from 4.5 billion?

Hi Bobby,

My immediate response is that 50 is very close to zero percent of 4.5 billion.

Suppose the question was "What percent is 50 of 200?" To do this I would calculate the fraction that 50 is of 200, that is $\frac{50}{200} = \frac14 = 0.25.$ To convert the decimal fraction to a percent multiply by 100 and get that 50 is 25% of 200.

To answer your question calculate the decimal fraction that 50 is of 4.5 billion and the multiply by 100 to convert the fraction to a decimal.


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