Young scholars conduct an experiment to determine how much hydrogen peroxide (H2O2) is actually in a store-bought solution of H2O2.

[Free Registration/Login may be required to access all resource tools.] Write percents as fractions in simplest form

This AAA Math tutorial covers calculating percents, relationships of percents to fractions and decimals, and uses of percents.

[Free Registration/Login may be required to access all resource tools.] Write percents as decimals and decimals as percents

Find the percent using a ratio and find a ratio using a percent. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you are told the correct answer....

[Free Registration/Login may be required to access all resource tools.] Recognize a percent as a ratio whose denominator is 100.

Practice writing percents as fractions and fractions as percents. For example, convert 30% to a simplified fraction. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login may be required to access all resource tools.] recognize and write percents as part of a whole out of 100.

Get independent practice relating ratios, decimals, fractions and percents. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.

Students learn about the concept of percent change by exploring a tutorial. They can then test their knowledge by taking a ten question assessment that increases in difficulty as they correctly answer questions.

[Free Registration/Login may be required to access all resource tools.] Write fractions as percents by using proportions and equal ratios.

Activities and factsheets exploring ratios and proportions in everyday life. Interactive, colorful, and fun.

Practice expressing a decimal like 0.546 as a percent. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice expressing a percent like 12.3% as a decimal. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Find a percent of a quantity as a rate per 100; solve problems involving finding the whole, given a part and the percent. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive...

[Free Registration/Login may be required to access all resource tools.] Identify equivalent ratios as fractions, decimals, and percents.

A guide to support parents as they work with their students with ratios and unit rates.

Learn how to calculate sale price when combining two "percent-off" discounts in this video from KQED. In the accompanying classroom activity, students develop and share a variety of strategies, including modeling with a 10 x 10 grid to...

The mathematics tutorial examines how to convert percents to decimals. Students learn about the concept through notes, examples, and practice problems.

The mathematics tutorial examines how to convert percents to fractions. Students learn about the concept through notes, examples, and practice problems.

This lesson defines the term ratio.

What do students understand? What gaps do they have in their understanding? How are fractions, decimals, and percents connected?

[Free Registration/Login may be required to access all resource tools.] Recognize unit scale as a ratio between units of measure of scale dimension to actual dimension.

The general manager of a fitness center explains how numerical calculations, percentages, and ratios are critical to his job in this video from KAET. In the accompanying classroom activity, students explore percentages, fractions, and...