Answer:

Step-by-step explanation:

Proportion
Ratio
___________
We have 6/12 and four fraction answer choices, all that have a bigger number than the numerator and denominator of 6/12 combined. We are asked to find the ratio equivalent to 6/12. To do this, we need to first realize that 6/12 simplified is 1/2. Meaning that our answer would be the ratio that is 1/2.
70/144 is not 1/2 simplifed, since 70 * 2 = 140. It is wrong
30/50 is not 1/2 simplified, scratch the 0's from the 3 and 5 to get the final fraction 3/5. It is wrong.
36/72 is 1/2 simplified, since 36 * 2 = 72. It is correct.
20/36 is not 1/2 simplified. It is incorrect