## Reflection: Developing a Conceptual Understanding Determine Equivalent Ratios - Scale Factor Between Terms - Section 1: Introduction

This lesson went very well, but I forgot to mention one thing in my narratives.  There are several ways to view the relationship between the terms of a rate.  While going over the example problem some students used division between the terms instead of multiplication.  That is very helpful, especially when trying to find an unknown value that is already n times greater than the other value.  Also, it is helpful to show alternative ways to multiply between the groups.  So in the example problem of hours to rainfall, the hours could be multiplied by 2.  However, the rainfall amount could be multiplied by 0.5 or divided by 2 to find the hours.  And, the hours can be divided by 0.5 to get the rainfall amount.

Division Works Too!
Developing a Conceptual Understanding: Division Works Too!

# Determine Equivalent Ratios - Scale Factor Between Terms

Unit 2: Proportional Relationships
Lesson 7 of 12

## Big Idea: Determine if ratios are equivalent by finding a common scale factor between terms.

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Standards:
Subject(s):
Math, Number Sense and Operations, equivalent ratios, scale factor, proportional relationships
45 minutes

### Grant Harris

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