I don’t know about you, but I absolutely love Chipotle and their guacamole. While grabbing lunch a few months ago, I was able to watch an employee make a batch since they have an open kitchen. While observing, I tried to make a mental note of the amounts of each ingredient.

Guac Recipe
Learn How to Make Guac at Home. Digital Image. Whats Cooking A Batch Made In Heaven. Chipotle Mexican Grill, n.d. Web 30 April 2015. <http://chipotle.com/guac-recipe>.

Now, as much as I love a good guac, I know I can not eat the amount of guac that Chipotle prepares. I needed to know how to make a small amount but I wanted it to taste the same. With this goal in mind, I set out to make guacamole by maintaining the ratio of ingredients used by Chipotle with smaller measurements.

After going through the process and problem solving used to make a small batch of guac, guess what ended up in my inbox? A message from Chipotle and a recipe for how to make smaller portions of their guacamole!

Real Life Math: Making Guacamole

This great recipe arrived just in time for Cinco De Mayo! I plan on serving a crowd so I plan on using six avocados instead of the recommended two. This is where knowing ratios and proportions can really come in handy. I can use equivalent ratios with larger quantities to make some great guacamole.

Example:

proportion example

After solving the proportion for x, I found that I would need 3/4 cup of red onions. I could continue the same process for each ingredient, but I noticed that I was just using a scale factor of 1 to 3. I can just triple each ingredient and I will be to ready make this tasty treat.

Now, Chipotle uses 48 avocados for 1 batch and they make multiple batches a day! Can you calculate how much of each ingredient they would need for a week’s worth of guac?

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Today, I’m linking up with 4mulaFunThe Teacher StudioTeaching to Inspire in 5th, and MissMathDork for a look at how math is used in the real world.  You might want to check out their Pinterest board to see previous Math is Real Life posts.

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Angela Culley

Angela Culley

Owner & Tutor at Math Ninja, LLC
As the founder of Math Ninja, Angela provides online and in person math tutoring for all ages including those studying for the GRE, GMAT, SAT, ACT, PPST, and other math specific subject assessments. Prior to launching her business, Angela coached K-12 educators on effective teaching strategies, curriculum writing, and assessment development.As a classroom teacher, she taught math to students ranging from grade 5 - 12. She has also taught both undergraduate and graduate math courses as an adjunct professor at the University of Virginia and Mountain State University.
Angela Culley
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