Illuminations: Understanding Rational Numbers and Proportions

In this lesson, students use real-world models to develop an understanding of fractions, decimals, unit rates, proportions, and problem solving.

The three activities in this investigation center on situations involving rational numbers and proportions that students encounter at a bakery. These activities involve several important concepts of rational numbers and proportions, including partitioning a unit into equal parts, the quotient interpretation of fractions, the area model of fractions, determining fractional parts of a unit not cut into equal-sized pieces, equivalence, unit prices, and multiplication of fractions.


*Requires membership to access lesson plan.

Math Topics
Fractions & Decimals, Irrational/Rational Numbers, Ratios, Rates & Percents
Middle School, Educator
6th Grade, 7th Grade, 8th Grade

What are you looking for?


Illuminations (National Council of Teachers of Mathematics)

Website URL

Type of Resource

Lesson Plan

Assigned Categories