Final answer:
The large fruit smoothie is 45% larger than the small fruit smoothie.
Step-by-step explanation:
To find the percentage increase in the size of the large fruit smoothie compared to the small fruit smoothie, we can use the formula:
Percentage Increase = ((Large Smoothie Size - Small Smoothie Size) / Small Smoothie Size) x 100
Plugging in the values, we get: ((17.4 - 12) / 12) x 100 = 45%
Therefore, the large fruit smoothie is 45% larger than the small fruit smoothie.