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| Math Central | Quandaries & Queries |
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Question from Bill: This Tuesday is my birthday and I will be 69. and I just wanted to know life ear is say earth is 6 billion years old I'm just curious to what percentage does my existence on earth represent I do realize that it's a flash in the pan |
Hi Bill,
Let's try something with smaller numbers.
15 is what percentage of 25?
15, as a fraction of 25 is $\large\frac{15}{25} \normalsize = 0.6.$ To convert this to a percentage multiply by 100 so 15 is $0.6 \times 100 = 60\%$ of 25.
Now use the same procedure for
69 is what percentage of 6,000,000,000?
Penny
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