Answer:
15 burgers for $20
Explanation:
I can't help you with a "ratio table" because that's new to me, but this is how you'd do it in the real world, and maybe it will help you fill out the ratio table.
How much does each burger cost?
We know that if we spend $12 we get 9 burgers, so if we divide we'll get the dollars-per-burger:
$12 ÷ 9 burgers = $1.33 per burger Or: 1.33$/burger
Divide the $20 by that, and the $ will cancel out, and number-of-burgers will move to the top of the fraction:
$20/1.33$/burger = 15
You can buy 15 hamburgers. Does that help?
Now that I think about it more, they might want you to recognize that the ratio 12:9 (dollars to burgers) is the same as 4:3 (I divided both sides by 3). From there you can see that if you multiplied by 5 you'd get $20 on the left side, and 15 burgers on the right.
That must be the core of the answer, but you'll have to put it in whatever table form you were taught.
It goes like this:
12:9 --> divide by 3: 4:3 --> multiply by 5: 20:15