Ratios, rates, proportions
Learn all about proportional relationships. How are they connected to ratios and rates? What do their graphs look like? What types of word problems can we solve with proportions?
This course contains 11 segments:
Intro to ratios
Ratios show up everywhere in life—sports, finance, medicine, cooking, you name it! In this tutorial, we learn what ratios are and how to use them.
Visualize ratios
Use double number lines, ratio tables, and tape diagrams to visualize ratios.
Ratio application
Expand on ratios by exploring part:part:whole ratios and ratios on the coordinate plane.
Intro to rates
Learn about a special type of ratio called a rate. A rate is the ratio of two measurements that have different units such as 10 kilometers per hour or 12 hot dogs per minute!
Intro to percents
Percent literally means "per cent" or "per hundred". Learn how to rewrite fractions as percents and vice versa.
Percent, fraction, decimal conversions
Decimals and percents are two ways of expressing the same number. For example, 0.5 and 50% mean the exact same thing. Learn how to convert decimals to percents and vice versa.
Percent problems
Learn how to solve percent problems like these: What is 80% of 25? Three is what percent of four?
Percent word problems
Learn how to solve a variety of word problems involving percentages.
Constant of proportionality
Identify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships.
Identifying proportional relationships
Learn how to tell whether two quantities are proportional by thinking about equivalent ratios and drawing graphs.
Writing & solving proportions
Learn how to write proportions and how to solve proportions.
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Rating | Not enough ratings |
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Length | 11 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math Pre-algebra |
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Rating | Not enough ratings |
---|---|
Length | 11 segments |
Starts | On Demand (Start anytime) |
Cost | Free |
From | Khan Academy |
Download Videos | On all desktop and mobile devices |
Language | English |
Subjects | Mathematics |
Tags | Math Pre-algebra |
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