Unit Rate/Dimensional Analysis

Hello my dear 8-2's,
Today, we went over Dimensional Analysis. You can hear the Squirrel below teach a few steps, but because of limited amount of space given to speak, it'll go fast and you will need to hear it multiple times.
There is also a written explanation below, so please use that! Hope this helps!
Note: there is NO FRACTION bar in the sample problem below...just think invisibly!


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Example:

4o c/sec = ____ pints/min

1. Take the unit rate that is given:

40 c • ___ • ___
sec

2. What unit do you want to change first?

good! Pints!

So what do you need to get rid of? cups!
Where do you put cups to get rid of it? On the bottom!
What's the bigger unit? 1!
How many cups in 1 pint? 2!

40 c • 1 pint • ___
sec......2 c

3. Now that you got rid of the cups, what is the next unit you want? min!
So, what should we get rid of now? seconds!
What's the bigger unit? min!
How many seconds in 1 min? 60!

40 c • 1 pint • 60 sec
sec ......2 c....1 min

4. Multiply straight across, or cross cancel. Reduce in simplest form.

40 • 1 • 60 = 2400 = 1200 p/min
1 • 2• 1 ...... 2

and you DID IT!!! :)