At a contest with 2000 participants, 1/2 of the people are aged 16 to 18. Next year, the number of people aged 16 to 18 will increase by 1/4. After this change, what percentage of the total 2000 people will the 16- to 18- year-olds represent?	Select
A) 62.50%	B) 60%	C) 70%	D) 65%	E) 66/3%
I just wanted to mention a couple of things here:   * this is a pure ratio question; the number 2000 is completely irrelevant, and you can ignore it if you like. When we increase something by 1/4, we are multiplying it by 1 + 1/4 = 5/4, so the answer here must be (1/2)*(5/4) = 5/8 = 62.50 %.   62.50%nswer : 62.50%
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At a contest with 2000 participants, 1/2 of the people are aged 16 to 18. Next year, the number of people aged 16 to 18 will increase by 1/4. After this change, what percentage of the total 2000 people will the 16- to 18- year-olds represent?