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? Let's think first. Chain of thought:
For the 40 hours worked, Greta earned a total of 40 * 12 = $480. To find how many hours Lisa has to work to earn $480, we divide 480 / 15 = 32.
Therefore, the answer is 32.