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15 August, 11:49

There 400 students in sixth grade of these students 180 are boys what percent of sixth graders are girls.

A) 30%

B) 45%

C) 55%

D) not here

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Answers (1)
  1. 15 August, 12:24
    0
    To solve this, you need to subtract 180 from 400: (400-180=220). After that (I used the fraction/proportion/variable way, but there are others), so 220/400=% (p) / 100. Multiply diaganolly, so 400*p=400p, which is equal to 220*100=22000. Therefore, 400p=22000. Now, you have to isolate the variable by dividing both sides by 400: 400p/400=p, and 22000/400=55. Therefore, p=55, or %=55, so the answer is 55%, or C.
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