Fraction Fiesta

Scaling Flavors with Math

The Guacamole Problem

You have \( \frac{1}{2} \) of an avocado.

You need to use \( \frac{1}{3} \) of that portion for a dip.

"How much of a WHOLE avocado are you using?"

?

Visualizing Parts of Parts

Scaling Up

A recipe calls for \( \frac{3}{4} \) cup of salsa for 1 person.

How much for 3 people?

\( 3 \times \frac{3}{4} \)

The Equation

\( \frac{3}{1} \times \frac{3}{4} = \frac{9}{4} \)

The Math

\( 2 \frac{1}{4} \) cups

The Final Result

Area Models

\( \frac{1}{2} \times \frac{2}{3} \)

Think of this as finding half OF two-thirds.

1 Split a square vertically into 3 parts (thirds). Shade 2.
2 Split it horizontally into 2 parts (halves). Shade 1.
3 The overlapping boxes are your numerator!

The Magic Word

OF

In math, OF means
MULTIPLY!

\( \frac{1}{4} \) OF 20 = \( \frac{1}{4} \times 20 \)

Mixed Number Fiesta

The Recipe Challenge

"A large batch of Churros needs \( 2 \frac{1}{2} \) cups of sugar. We need to make \( 1 \frac{1}{2} \) times that much!"

\( 2 \frac{1}{2} \times 1 \frac{1}{2} \)

\( \frac{5}{2} \times \frac{3}{2} \)

1

Change to Improper Fractions

2

Multiply Straight Across

3

Simplify/Change Back to Mixed

\( \frac{15}{4} = 3 \frac{3}{4} \) cups

Portion Control

"You have \( \frac{1}{3} \) of a tray of Tres Leches cake. If you share it equally among 4 friends, how much cake does each person get?"

\( \frac{1}{3} \div 4 \)

THE PROBLEM

\( \frac{1}{12} \)

THE PIECE

Recipe Exchange!

Partner Up

Find your cooking partner and grab your unique Recipe Card.

Scale It

Multiply or divide your ingredients based on your Fiesta Target!

Verify

Exchange with another pair to "Taste Test" their math accuracy.

Ready... Set... COOK! 🧑‍🍳

Fraction Fiesta

Fiesta Lesson Guide

Fiesta Teaching Slides

Recipe Exchange Activity

Fiesta Practice Worksheet

Fiesta Project Packet

Fiesta Practice Answer Key

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