OG详解-OG4 数学1 Q2

Choice A is correct. Let x represent the percentage of 300 that is 75. This can be written as x100​​ (300)= 75, or 3x = 75. Dividing both sides of this equation by  3 yields x = 25. Therefore, 25% of 300 is 75.
Choice B is incorrect. 50% of 300 is 150, not 75. Choice C is incorrect.  75% of 300 is 225, not 75. Choice D is incorrect.  225% of 300 is 675, not 75.