# Currency conversion

One of the things we haven't really lookedat in class yet would be doing currency conversions.

People have a little bit of trouble with thisjust because of the way the charts are laid out.

We need to look at what they mean.

WhenI look at this one, the top says dollars per foreign, and per means divide, so this oneis set up as dollars over the foreign.

That means that this chart, if I'm looking at Canadiandollars means 1.

005 dollars per 1 foreign, like this.

On this side, if I'm looking at Canadian dollars, it means foreign per dollar,so it would be.

9950 Canadian dollars per one dollar.

It tells you what you've go onthe top, in the way that you're using this.

So, let's do a little bit of a conversion.

Let's do something.

Let's see here.

We can see when we look at it that we have 1.

005dollars per one foreign.

Let's see how we might be able to use that.

Let's go back toslide 1.

I have my 1.

005 dollars or my.

If we go back and look at our slide, 1.

005 dollarsper one foreign means we have one CAD.

Let's see if we can use that one.

If we have a dollarthirty-four, and we put that over one, just like we did everything else in class, we needto have the dollars on the bottom.

We could put 1.

005 dollars and one Canadian like thatif we want to.

We could also use the other one as long as we make sure that whateveris on the top we put on the bottom to cancel.

If we were doing this one, we would do 1.

34times one and see the dollars would cancel, and we would have 1.

34 divided by 1.

005.

Wewould have !, Oops, no dollar sign.

We wouldn't need a dollar sign because this is Canadiandollars.

We would have 1.

It's just like it was before.

You justneed to pay attention to the chart.

Let's do one with a little bit more converting.

Let's say we have gas that is 1.

Well, we know that when we do gas inthe United States, we do it as dollars per gallon.

We need to change the 1.

34 Canadian,and we need to also change the liters.

If I go back and look at my chart, we want tomake sure we change CAD to regular dollars.

I've got to put the CAD on the bottom.

I'mgoing to use the other side of the chart this time.

I could use either side, as long asI remember to put the one on the bottom that I need.

When I look at my chart I have.

9950CAD is for every one dollar that I have.

I can use that because that would make CAD cancel.

When I go back and look at my metric chart, which we've had several times.

If you go backand look at your US to metric, I have, I want to make sure I get rid of liters.

Since litersis on the bottom, I need to have liters on the top.

we know that 3.

785 is one gallon.

If I do that, liters will cancel.

That's the whole point in this game that we're playingis that if we have something on the top, we need to put its equivalent on the bottom tomake it cancel.

That's why I've got liters on the bottom, and had to put liters on thetop to make it cancel.

Now we just have to deal with the numbers we have left.

We havedollars on the top, which is what we want and gallons on the bottom, which is what wewant.

1.

34 times 3.

785 is equal to 5.

0719 on the top and we have dollars left on top.

What do we have on the bottom? 1 times.

9950 times 1, so we have.

9950 and the abbreviationfor gallon on the bottom.

We have 5.

0719 divided by.

9950, would leave us paying 5.

097, andwhen we change that to money, that's roughly 5 dollars and ten cents on the top per gallon.

That's a high price to pay for gas.