Ratio and proportion
posted by Alex L. .
About 9 out of 10 adults think it is a good idea to exercise regularly. But the ones who think it is a good idea, only 1 in 6 actually exercises at least 3 times a week. At this rate, how many of the 300 employees in our company exercise regularly?
What I did so far was write this:
9/10 = x/300
That's a good start.
1/6 = x/270
The answer depends upon how one defines "regularly". If they mean "at least three times a week", the answer is
(9/10)*(1/6)*300 = 45
not really a proportion problem
How do I state this question?
- At least 45 employees exercise regularly out of that rate
About 45 employees in the company exercise regularly
It's because of the different rates that confuse me.
well, 9/10 of the 300 want to do it
and (1/6) of that (9/10) actually do it
so 1/6 * 9/10 * 300