Answer: The unit rate of lemonade to cranberry is 1 liter of lemonade to 1/5 liter of cranberry juice.
Step-by-step explanation: Double the 1/2 to get 1, and double the 1/10 to get 1/5.
Usually, unit ratios are the other way around. The smaller unit to the larger units.
This would be 1:5 Cranberry Juice to Lemonade: 1 Liter of Cranberry to 5 liters of lemonade. It's usually easier to work with whole numbers rather than fractions.