Stock Market Fractions
Date: 04/05/2002 at 11:41:16 From: Jennifer Subject: Fractions Stock closed on Friday at a price of 42 5/8. On Monday stock closed at 39 7/8. How much did the market value of stock drop on Monday?
Date: 04/05/2002 at 13:23:03 From: Doctor Ian Subject: Re: Fractions Hi Jennifer, Once you strip away the irrelevant details, you're left with the problem 42 5/8 - 39 7/8 = ? There are at least a couple of ways you could go about answering this. One would be to recognize that 1/8 is the same as 0.125, so the problem is equivalent to 45.625 - 39.875 = ? Another way to deal with it would be to figure out what you'd need to add to 39 7/8 to get up to 42 5/8. I would do that in two steps: 1. How much would you have to add to get from 39 7/8 to 40? 2. How much would you have to add to 40 to get to 42 5/8? Add the results of steps 1 and 2 together, and you have your answer. Okay, there is a third way to do it, too, which is probably what you're 'supposed' to do: Convert 42 5/8 to 41 13/8 (do you see why they're the same?), to make the subtraction easier: 42 5/8 - 39 7/8 = 41 13/8 - 39 7/8 = ? This is similar to what you do when you perform a carry in subtraction. I hope this helps. Write back if you'd like to talk more about this, or anything else. - Doctor Ian, The Math Forum http://mathforum.org/dr.math/
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