UFA in a Nutshell

Find the unit of the answer and write it down. The answer is usually a noun close to the question words, “how many,” “how much,” or “how long.”
Find the verb of the question you are asking, translate it into an “equal” sign, and write down this equal sign after the unit of the answer.
Find a noun to the right of the verb and determine its unit, the problematic unit. There will usually be a number associated with this unit; write down this number and its problematic unit after the equal sign.
Compare the problematic units to those of the answer. If they are not the same, do the following sub-listitems:
- Introduce a unit factor whose numerator (top) contains the unit of the answer or whose denominator (bottom) contains a problematic unit.
- Cancel any units which appear as both numerator and denominator. Do not cancel any numbers associated with these units. Examine the remaining un-canceled units; these are now the problematic units.
Repeat this step as many times as needed to make the units the same on both sides of the equal sign.
Skip to a new line and write a new equal sign.
Now that the units of the answer are the same as those of the problem, multiply and divide all of the numbers on the right-hand side and write the answer with its unit.