OG详解-OG10 数学2 Q8

Choice D is correct. The proportion of the paperclips that are size large can be written as 234,000300,​000​, or 0.78. Therefore, the percentage of the paperclips that are size large is 0.78(100), or 78%.
Choice A is incorrect. This is the percentage of the paperclips that are not size large. Choice B is incorrect and may result from conceptual or calculation errors. Choice C is incorrect and may result from conceptual or calculation errors.