For the 40 hours worked, Greta earned a total of 40 * 12 = $<<40*12=480>>480.

To find how many hours Lisa has to work to earn $480, we divide 480 / 15 = <<480/15=32>>32

# Answer

32
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Greta worked 40 hours and was paid $12 per hour. Her friend Lisa earned $15 per hour at her job. How many hours would Lisa have to work to equal Greta's earnings for 40 hours?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
32
Greta worked 40 hours and was paid $12 per hour. Her friend Lisa earned $15 per hour at her job. How many hours would Lisa have to work to equal Greta's earnings for 40 hours?
train