ratio and proportion

Explains the meanings of percents and ratios, discusses calculation techniques, and includes many examples.

Explores methods of solving ratios and proportions word problems using space examples.

Introduces the Pythagorean theorem and ratios through a story in which Pythagoras comes up with a solution to tune his cousins' instruments so they can perform in a music contest.

Real-life situations associated with money and shopping present problem-solving opportunities and show how math works in day-to-day activities.

While traveling back to their warlord's palace in ancient China, Chuan and the artist to whom he is apprenticed join a troupe of puppeteers and Chuan learns about puppet proportions. Includes instructions for making a simple sock puppet.

A guide to understanding ratios and percents that covers equivalent and reducing ratios, rates, distance, time, proportions, ratios in geometry, scale drawings, models, the golden ratio, proportions, the percent equation, sales tax, simple and compound interest, and more.

Presents an introduction to the concepts of proportions, ratios, and scaling, as students partake in the regional Science Olympiad, and also covers the concepts of scale factors, unit rates, and tape diagrams. Includes a discover activity, a historical connection, and a glossary.

Reinforces classroom learning of important percent and ratio skills including reducing ratios, the golden rectangle, and the meaning of percents.

Tells the story of phi, the never ending, never repeating number known as the Golden Ratio, written as 1.6180339887..., looking at how it has been used, and claims about its use, throughout the history of mathematics.

Tells the story of phi, the never ending, never repeating number known as the Golden Ratio, written as 1.6180339887..., looking at how it has been used, and claims about its use, throughout the history of mathematics.