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Approximately 9 out of 10 smokers began smoking before the age of 21. In a group of 400 smokers, about how many of them started before they reached their 21st birthday?

Approximately 9 out of 10 smokers began smoking before the age of 21. In a group of 400 smokers, about how many of them started before they reached their 21st birthday?
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Approximately 9 out of 10 smokers began smoking before the age of 21. In a group of 400 smokers, about how many of them started before they reached their 21st birthday?

User Skymedium
by
7.7k points

1 Answer

5 votes
400 / 10 = 40.

40
X 9
= 360

In a group of 400 smokers, about 360 of them started before they reached their 21st birthday.

User Akdeniz
by
8.3k points
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