The weight of a glass of jar is 20% of the weight of the jar filled with coffee beans. After some of the beans have been removed, the weight of the jar and the remaining beans is 60% of the original total weight. What fraction part of the beans remain in the jar?  Choose the correct answer:
A) 1/5
B) 1/3
C) 2/5
D) 1/2
E) 2/3
Let weight of jar filled with beans = 100 g   Weight of jar = 20 g   Weight of coffee beans = 80 g   Weight of jar and remaining beans = 60 g   Weight of remaining beans = 40 g   Fraction remaining = 40/80 = 1/2   Answer is 1/2.
<result>D</result>
The weight of a glass of jar is 20% of the weight of the jar filled with coffee beans. After some of the beans have been removed, the weight of the jar and the remaining beans is 60% of the original total weight. What fraction part of the beans remain in the jar?