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OpenStudy (anonymous):
what is the proportion? 100 feet is to 140 feet as 15 feet is to 21 feet
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OpenStudy (anonymous):
5/7
OpenStudy (anonymous):
BTW, you get that by simplifying 100/140
OpenStudy (anonymous):
I think you are looking for 5/7. ie, (100/20)/(140/20)=5/7 and (15/3)/(21/3)=5/7
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