A two-liter cola costs $1.19 and 6 cans each containing 16 oz cost $1.59. Which is the better buy and by how much?

The 6 cans, containing 16 oz each is the better buy.
16x6= 96 oz
96 oz converted to liters, is 2.83906 liters.
So it's better to buy the cans by .83906