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ランダム 質問

please help!!! 2 リスペクト for whomever helps

The ratio of pens to pencils in a box i 2 to 7 If there are 27 pens and pencils in the box all together then how many pencils are there?

this math "ratio" problem scares the crap out of me I really dont get anything!!!
please help me!
 R33n33sm3 posted １年以上前
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alucard768 said:
i got 94.5
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posted １年以上前 
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and how did あなた get that please explain!
R33n33sm3 posted １年以上前
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i did a proportion and multiplied 27by7 and got 189 then divide that によって 2
alucard768 posted １年以上前
katiecain said:
Okay, I think this is right, but I don't do Maths anymore (I'm at college) so its been a while.

So the ratio is 2:7. That makes 9 parts (2+7=9). あなた then divide the 27 pens and pencils によって the 9, which makes 3. And as the ratio is 2:7, あなた times it によって the 7 because that's the proportion of pencils. 3 times によって 7 is 21, so the answer is 21.
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posted １年以上前 
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thanks very much for your big help :)
R33n33sm3 posted １年以上前
camosolidsnake said:
The ratio is 2 pens to 7 pencils, Right? Okey that means for every 2 pens, あなた get 7 pencils. 2+7=9 , 27/9=3 . That means あなた get 6 pens and 21 pencils. I could be wrong , but then again I wa..... JOHNSON!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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posted １年以上前 
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thanks so much!
R33n33sm3 posted １年以上前
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Not a problem.
camosolidsnake posted １年以上前
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