Answer:
The Ratio of Lunch shift waiters : Dinner shift waiters = 1 : 3
Explanation:
Here, given:
The number of waiters working the lunch shift = 4
The number of waiters working the dinner shift = 12
So, the ratio of Lunch shift waiters : Dinner shift waiters = 4 : 12
Or, expressing 4: 12 in lowest form, we get

Hence, the Ratio of Lunch shift waiters : Dinner shift waiters = 1 : 3