Number Sense and Proportional Thinking · Number and Operations
The Power of Percentages
Applying percentage increases and decreases to financial literacy topics like discounts, taxes, and interest.
Key Questions
- 1Why is a 20 percent increase followed by a 20 percent decrease not the same as the original value?
- 2How do percentages allow us to compare data sets of different sizes fairly?
- 3In what ways can mental estimation of percentages improve our financial decision making?
Ontario Curriculum Expectations
ON: Number - Grade 7
Grade: Grade 7
Subject: Mathematics
Unit: Number Sense and Proportional Thinking
Period: Number and Operations
Suggested Methodologies
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