How do I use ratio tables to solve problems+Unit Rates

It goes ike this

Head Bands : 12 48
Cost ($) : 24 ?

F. 24
G. 48
H. 60
L. 96

And how do I do this?

One bus leaves a stop every 9 minutes. A second bus leaves the stop every 15 minutes. if they both leave at 1:25 P.M, at which time will they next leave together?

A. 1:40 PM
B. 1:49 PM
C. 2:10 PM
D. 2:25 PM

I'm asking for help on this, but if you can try and answer the questions while helping, that would be fantastic! Please help me, I just want to pass 6th grade :(
Asked Oct 21, 2014
6th grade was tough; I remember it well lol. This one is simple, but it takes a bit of brain power to really wrap around your mind.

Count by nines for a while. Make a chart that goes up to... Let's say, 10.

9, 18, 27, 36, 45, 54, 63, 72, 81 90.
Now, count by 15.
15, 30, 45, 60, 85, 90, 105, We don't need to go farther.

Now, find the smallest number that shows up in both of the multiplication lines.
As you can see, the answer is 45. So, every 45 minutes, the buses will leave together. 1:25 PM plus 45 minutes equals 2:10.
Answered Oct 21, 2014
Edited Oct 21, 2014
Thank you so much!!!

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