Ratios and Proportions

🔹 What Is It?

A ratio compares two numbers.
A proportion shows that two ratios are equal.

🧩 Clue to Remember

Ratios can be written as:
a to b, or a : b, or a/b

🔹 Example

If 2 pencils cost 4 dollars, then 4 pencils cost 8 dollars.
That’s a proportion — same ratio!

💡 Why It Matters

Ratios help in recipes, maps, models, and converting units.