There are 3/ 1/4 = 12 one-fourth miles in 3 miles.

So, Lexi will have to run 12 (from 3 miles) + 1 (from 1/4 mile) = <<12+1=13>>13 complete laps.

# Answer

13
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Lexi wants to run a total of three and one-fourth miles. One lap on a particular outdoor track measures a quarter of a mile around. How many complete laps must she run?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
13
Lexi wants to run a total of three and one-fourth miles. One lap on a particular outdoor track measures a quarter of a mile around. How many complete laps must she run?
train