Math CentralQuandaries & Queries


Question from Mari:

I am trying to find out what percentage of our worlds population does the youtuber
Pewdiepie have for subscribers? So he has 91 million subscribers and there are roughly
7.53 Billion people in the world. So what percent of our worlds population does Pewdiepie
have for subscribers? Am I asking this correctly? I am just curious for marketing reasons
and how much of the worlds market share does pewdiepie have for his youtube
channel? I just do not know how to set up the problem to find the answer?

Hi Mari,

One million is 1,000,000 and 1 billion is 1,000,000,000 and hence as a fraction of the population of the world his subscribers are

\[\frac{91 \times 1,000,000}{7.53 \times 1,000,000,000}\]

which is

\[\frac{91,000,000}{7,530,000,000} = \frac{91}{7,530}.\]

Write this fraction as a decimal and then multiply by 100 to express it as a percentage.


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