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."
Mangahigh
Mangahigh: Number: Find Percents No Calculator
Explore percents and how to determine the percent of a number.
Mangahigh
Mangahigh: Number: Find the Percent Change No Calculator
Test your knowledge of the percent of a number.
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.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Percents 2
Twenty-eight problems present a variety of percent topics: percents as fractions, improper, and mixed numbers, percents as decimals, simple interest, and percent of increase/decrease. They are given with each step to the solution...
CK-12 Foundation
Braingenie: Whole Number Percentage Calculations Without Units
[Free Registration/Login may be required to access all resource tools.] In this activity, students are to determine the percent of a number. Watch a video for additional help and answer a practice problem.
Shmoop University
Shmoop: Ratios & Percentages: Working With Percents
Students learn how to find a percent of a number. The mathematics resource consists of examples and practice problems with answers.
Mangahigh
Mangahigh: Number: Find the Percent Change Calculator
Test your knowledge of finding the perent of a number.
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.
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.
Mangahigh
Mangahigh: Number: Find One Amount as a Percent of Another Calculator
Determine the decimal of a given percent.
Mangahigh
Mangahigh: Number: Find Percents Calculator
Determine the decimal that is related to the percent.
Mangahigh
Mangahigh: Number: Use Percent to Find Original Value No Calculator
Use percents to determine the original value.
Mangahigh
Mangahigh: Number: Percent Increase and Decrease No Calculator
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.
Mangahigh
Mangahigh: Number: Percent Increase and Decrease Calculator
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.
Texas Instruments
Texas Instruments: Analyzing Number Cube Sums
In this activity, students extend their understanding of theoretical probability and patterns. They use number cubes, to build awareness that a fraction and its decimal and percent representation on the calculator are "close," but not...
Mangahigh
Mangahigh: Number: Use Percent to Find Original Value Calculator
Use the inverse operation to determine the original amount.
PBS
Pbs Learning Media: A Tip on Tipping
This TV 411 segment features a lesson from Question Man on how to informally calculate 15% tips at restaurants.
Other
Quick Math: Numbers Percentages
This QuickMath activity changes percentages to decimals or fraction and vice versa. It also calculates a certain percent of a number or vice versa.
CK-12 Foundation
Ck 12: Chemistry: Calculating Atomic Mass
[Free Registration/Login may be required to access all resource tools.] Covers definition of atomic mass and calculations of atomic mass.
University of Cambridge
University of Cambridge: Nrich: Put Out the Flags
Sharpen your logic and percent skills while working on this challenge. A strategy for solving the problem and the solution are available from links on the left.
Mangahigh
Mangahigh: Number: Find One Amount as a Percent of Another No Calculator
When given a word problem determine the fraction.
Khan Academy
Khan Academy: Discount, Tax, and Tip Word Problems
Practice solving word problems involving price discounts, taxes, and tip calculations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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....