Math Antics
Ratios & Rates
What a ratio is and how it shows up in everyday comparisons.
Watch on YouTubeCompare two quantities — and find ratios that mean the same thing.
Read this first — it covers the idea in plain language with a worked example.
A ratio compares two amounts. If a recipe uses 2 cups of flour and 3 cups of sugar, the ratio of flour to sugar is 2 to 3 — written 2:3 or 2/3.
Flour to sugar (2:3) is not the same as sugar to flour (3:2). Always write the parts in the order the problem names them.
Multiply or divide both parts of a ratio by the same number to get an equivalent ratio that describes the same comparison.
Are 2:3 and 8:12 equivalent?
Watch the main video, then check the second take if you want another explanation.
What a ratio is and how it shows up in everyday comparisons.
Watch on YouTubeAnother walk-through of writing a ratio to compare two quantities.
Watch on YouTubeTry a worksheet or work through some problems before the quiz.
A couple of questions to make sure this topic stuck. Retake as many times as you want.
What Is a Ratio?
Write the ratio of 5 dogs to 8 cats.