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Posted by noah on Friday, December 7, 2012 at 11:52pm.

What fraction = .40625

40625/100000 Reduce 40625=5^5 times 13 100000=5^5 times 2^5

also, we know that 5/8 = 0.625,so we have 2/5 + 5/8000 = 641/1600

oops. That's 2/5 + 5/800 = 13/32

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