Since a percent is out of 100 then writing a percent in fraction form would be whatever the percent is over 100. so if youre trying to figure out what 70 out of 250 is in percent for you would write it like this:
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It's C because you need to find how many points each student earned per grade (freshman & sophomore). Then you multiply it by 30 to find out how many points each student scored in the whole class.
23.8% of 164 is 39.032 so minus that off of 164 and you would've sold 124.968 cars and im guessing you should round so the dealership would've sold 125 cars.