How Do You Solve It?

Anna97

New member
Joined
Dec 1, 2014
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2
Hi guys.

I came across a lesson in my Algebra 2, and got completely lost. The lesson is about problems like this:

Astronomers found that 0.017 of the stars examined were red dwarfs. If 29,000 stars were examined, how many were not red dwarfs?

I tried to solve these problems like this:

(a) .017/1000 = red dwarfs/stars examined = n/29,000

(b) .017 times 29,000 divided by 1000 = n = .493

(c) 29,000 - .493 = Answer = 28999.507

However, the answer is close, but wrong, every time. This answer is
28,507 according to the answer key. Am I using the wrong formula to solve it? What am I doing wrong here?

Your help is greatly appreciated!
 
Equivalently,
0.02 of the apples examined are green.
2800 apples are examined.
How many are not green?

1- 0.02= 0.98 so 0.98(2800)= 2744 are not green.
 
Astronomers found that 0.017 of the stars examined were red dwarfs.
Does the exercise say "0.017 of the stars", or does it perhaps say "0.017% of the stars"? ;)
 
Thanks Guys

Thanks for your help everyone. It makes much more sense now. :D
 
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