Answer: Soup B
Step-by-step explanation: You can find the common denominator for each ratio, and then compare.
Soup A : 3 grams of sodium for 13 cups of soup,
therefore: 30 grams of sodium for 130 cups of soup
Soup B: 9 grams of sodium for 10 cups of soup,
therefore: 117 grams of sodium for 130 cups of soup
So, Soup B has more sodium per cup.
If you want to figure out the amount of sodium for 1 cup, divide the amount of sodium by the amount of soup. Hope this helped!