To find the amount of time Charla takes to complete the entire picture, we need to find the reciprocal of 2/3, which is 3/2.
To find out how long it takes Charla to complete the entire picture, we multiply 3/2 by 1/2, which equals 3/4. Answer: \boxed{\frac{3}{4}\text{ hour}}.
Charla wants to cover a certain rectangular area of her driveway with a picture using chalk. If she completes 2/3 of the area in 1/2 hour, how long will it take her to complete the entire picture?(
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