National Council of Teachers of Mathematics
Ntcm: Math Challenge: Perplexing Percentages
Test your bargin shopping skills by figuring out which discount offers the greatest savings. A one page activity from the NCTM Math Challenges for Families series that focuses on understanding and calculating percentages. Connections...
BBC
Bbc: Ks3 Maths: Percentages
KS3 Math provides interactive activities on percentages, using pence and pounds. Use the factsheet for percentage information. You may use the worksheet for percentage practice and take the test provided to check your percentage skills....
BBC
Bbc: Percentages
You can pick up some valuable percentage pointers on how to work with them. When you finish working your way through the pages, you can take an on-line "Test Bite" and check your understanding.
Primary Resources
Primary Resources: Percentages
A selection of teacher resources dealing with percentages. There are worksheets and PowerPoints available to download.
TeachEngineering
Teach Engineering: Decimals, Fractions & Percentages
Students learn about and practice converting between fractions, decimals and percentages. Using a LEGO MINDSTORMS NXT robot and a touch sensor, each group inputs a fraction of its choosing. Team members convert this same fraction into a...
National Council of Teachers of Mathematics
The Math Forum: Beat the Calculator!
Find more than 500 "mental calculation tricks" that will help you square numbers, add, multiply divide, subtract, and find percentages. A great resource for advance math students, gifted children, and teachers wanting to find ideas for...
BBC
Bbc: Gcse Bitesize: Monitoring Chemical Reactions
This lesson focuses on percentage yield including what it is, the formula for calculating percentage yield, a sample calculation, and a link to a test.
![Sprk: Macro Lab Lesson 4 Percentages: Teacher Guide [Pdf] Lesson Plan](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Sprk: Macro Lab Lesson 4 Percentages: Teacher Guide [Pdf] Lesson Plan")
Other
Sprk: Macro Lab Lesson 4 Percentages: Teacher Guide [Pdf]
Students will use Sphero to explore percentages using speed and color. The speed experiments are quantitative and the color experiments are qualitative. They will program the Sphero to move at 100% speed for a particular amount of time,...
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Percent With a Calculator
This tutorial explains how to use a calculator to find a percent. There is also a practice section at the end of the lesson.
Wyzant
Wyzant: Percentage Calculator
WyzAnt provides applets that allow the user to input as much of the percentage question that is known, and it will compute the rest.
Calculator Soup
Calculator Soup: Vote Percentage Calculator
Calculate the percentage weight of two or three numbers that make up a total sum of the sample set, as in vote percentage calculations for an election.
Calculator Soup
Calculator Soup: Percent to Decimal Calculator
Input the percent value that you would like to convert to a decimal. This calculator divides by 100 to convert percents to decimal values.
Chiral Publishing
Chiral Publishing: An Introduction to Chemistry: Percentage and Percentage Calculations: Audio Book
This audio book, narrated by author Mark Bishop, provides examples of how to calculate percentages. Calculations for percent mass and volume are shown. Also find links for tutorials and power points about other chemistry topics.
NumberNut
Number Nut: Percentages
Did you know that the word percent is based on two ancient words, "Per" and "Centum" which means part of one hundred? Learn how to calculate percent and find out how it is used in business.
Google
Google for Education: Percentages
This activity asks students how to quickly and accurately calculate percent problems in our heads.
BBC
Bbc: Gcse Bitesize: Chemical Calculations
You should be able to calculate the masses of reactants and products from balanced equations, and the formula of a compound from information about reacting masses.
Education Development Center
Tune in to Learning: Multiple Percents
Have you ever seen an item that you wanted on sale for 15% of its original price? Have you tried to figure out what the sale price would be? Using this interactive lesson from T.V. 411, you can learn to calculate discounts with percentages.
E-learning for Kids
E Learning for Kids: Math: Fashion Store: Fractions and Decimals
On this interactive website students practice various math skills using a real-life scenario by picking out clothing. Those skills include calculating percentages using fractions and calculating the new cost of a product after a...
Texas Instruments
Texas Instruments: Eating Out
In this activity, students examine data and make graphs to represent the data. They interpret the data and answer questions. They also learn to calculate percentages and angle measures.
Math Is Fun
Math Is Fun: Percentage Calculator
Use this percentage calculator to "calculate a percent of a value" or "find the percent change between two values." Provided answers include steps for carrying out the calculations yourself.
Math Is Fun
Math Is Fun: Percentages
The learning activity investigates percentages. Topics examined are converting percents to decimals, converting percents to fractions, and the percentage difference. Links to additional resources and a percentage calculator are included.
Calculator Soup
Calculator Soup: Fractions Table
Table shows incremental ordering of fractions with decimal and percentage equivalents.
Calculator Soup
Calculator Soup: Sales Tax Calculator
Calculate a simple single sales tax and a total based on the entered tax percentage.
National Council of Teachers of Mathematics
The Math Forum: Finding 2.5 Percent of a Number
This site provides shortcuts and hints on how to do more complicated percentages without a calculator. For others beside 2.5, scroll down the left column and click percentage of choice under "Percents."