Liam highlighted the columns in the multiplication table below to find equivalent ratios. The same number goes into each box to make the two ratios below equivalent.

Which number goes into both boxes?
6
9
12
18

Arectangular garden is 5 feet long and 3 feet wide. a second rectangular garden has dimensions that are double the dimensions of the first garden. what is the percent of change in perimeter from the first garden to the second garden?