4 Ratio & Proportion

Ratios and proportions may well be the most important ideas in all of arithmetic; they are the ones we use most often in the real world. If ratio and proportion have confused you try out our visualizations. If you experiment with them, they can help you to understand these powerful ideas and use them in your real world activities.
Picture ratio as a triangle and picture proportion as two similar triangles.

4.1 Ratio

  • Ratios

  • Rates

4.2 Proportions

  • Setting up Proportions

  • Solving Proportions

4.3 Percent

  • Percents

  • Percent Equations

  • Percent Change

4.4 Converting Percents to Fractions

  • Converting Percents to Decimals

  • Converting Percents to Fractions

4.5 Additional Assignments

  • Converting American to Metric Units

  • Unit Rates

  • Sales Tax

  • Simple Interest

  • Compound Interest

  • Metric Conversions

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Topics

1 Whole Numbers
2 Fractions
3 Decimals
4 Ratio & Proportion
5 Tables & Graphs
6 The Real Numbers
7 Solving Linear Equations
8 Graphing Linear Equations
9 Systems of Equations
10 Geometry
11 Polynomials
12 Factoring
13 Rational Expressions & Equations
14 Exponents & Radicals
15 Quadratic Equations
16 Introduction to Functions
19 Exponential and Logarithmic Functions