How to calculate relative frequency in this question? MEDAL!!

Question

calculusxy · Answer

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tkhunny · Answer

Add up the two vertical and two horizontal totals and the grand total.  Then work backwards.

calculusxy · Answer

Okay so the total for doing chores is 16
Total for not doing chores is 9

Total for people who get allowance is 18
Total for people who do not get allowance is 7

calculusxy · Answer

What do I do these totals?

calculusxy · Answer

@Kainui

calculusxy · Answer

So the question is: What is the relative frequency of students that do chores and get an allowance to the number of students that do chores?

calculusxy · Answer

Is it that since I know 13 students do chores and take an allowance and the total for doing chores is 16, do  I divide 13 by 16?

calculusxy · Answer

And then multiply it by 100 to get the percent?

tkhunny · Answer

Don't multiply by 100 to get %.  It's already %.|dw:1454531651484:dw|

That's it.  Now, divide everything by 25 and you will have your relative frequencies.  It does not matter if you write 13/25 or 0.52 or 52%.  Take your pick.  They are all the same