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.
InterLink Language Centers
Interlink Language Centers: Calculators and Converters
Conversion calculators for English language learners. Includes calculators for converting temperature, currency, measurement, time, distances, and percentages. Java is required.
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.
Cuemath
Cuemath: Percentages
A comprehensive guide for learning all about percentages with definitions, how to calculate them, solved examples, and practice questions.
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 learners 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.
Math Open Reference
Math Open Reference: Percent
Explore percents with this easy reference guide. Learn how to convert fractions to percents and percents to fractions. Try the sliding bar to see how a percentage is calculated. Detailed explanations and examples are included.
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.
Calculator Soup
Calculator Soup: Percentage Calculator
Find a percentage or work out the percentage given numbers and percent values. Use percent formulas to figure out percentages and unknowns in equations. Add or subtract a percentage from a number or solve the equations.
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.
Calculator Soup
Calculator Soup: Odds Probability Calculator
Convert stated odds to a decimal value of probability and a percentage value of winning and losing. This calculator will convert "odds for winning" an event or "odds against winning" an event into percentage chances of both winning and...
Calculator Soup
Calculator Soup: Percentage Change Word Problems
This calculator helps you practice word problems that involve percentage change.
Calculator Soup
Calculator Soup: Fraction to Percent Calculator
Convert a fraction to a percent. Convert proper and improper fractions to percentages. This calculator shows the steps and work to convert a fraction to a percentage number.