Curated OER
Changing Percents into Fractions
Find out what a percent is, how it relates to fractions, and how to change a percent into a fraction. Viewers are shown three different examples where 100 becomes the denominator and the newly formed fraction is reduced. This clip could...
Curated OER
Changing Fractions into Percents
While this method only works on certain fractions, it does help learners see the relationship between fractions and percentages. The tutor works through three example problems where he simply changes the denominator to 100 and then...
Curated OER
Changing Decimals into Percents
Apparently all you need to know when converting a decimal into a percent, is that the decimal moves over two places. Watch how tutor Duane simply makes the decimal point jump in order to convert a decimal into a percent.
Virtual Nerd
How Do You Solve a More Complicated Interest Problem?
This word problem on simple interest has a bit of a twist. When you read this word problem it boggles the mind. I know, it boggled mine. But never fear, the instructor takes you through this seemingly complicated interest problem...
Curated OER
How Do You Use a Proportion to Find a Whole?
An explanation of the percent proportion formula. Identify the variables. Plug in the known values. Cross multiply. Use division property of equality to solve. A step-by-step example.
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Identifying Percent Amount and Base
This video shows how to identify the percent amount and base in a word problem. Practice problems are available. [2:32]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Solving Percent Problems
This video demonstrates how to find the base number when given a percentage and amount. Practice problems are available. [6:17]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Describing the Meaning of Percent
This video describes the meaning of percent by showing shaded squares out of 100. Practice problems are available. [3:01]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Describing the Meaning of Percent 2
This video describes the meaning of percent by showing shaded squares out of 100. Practice problems are available. [2:22]
Math TV
Math tv.com: Basic Mathematics: Basic Percent Problems
A math teacher and several students guide you through solving a collection of basic problems involving percents. Watch videos for step-by-step solutions to questions, such as, "What number is 15% of 63?" and "25 is 40% of what number?"...
Math TV
Math tv.com: Basic Mathematics: Basic Percent Problems: Applications
A teacher and several math students offer step-by-step solutions to word problems involving percents. Examples include, "How much HCl is in a 60-milliliter bottle that is marked 80% HCl?" and "Suppose the purchase price of a stereo...
Sophia Learning
Sophia: Dividing Whole Numbers by Percentages: Lesson 1
This lesson demonstrates how to divide a whole number by a percentage. It is 1 of 12 in the series titled "Dividing Whole Numbers by Percentages."
Sophia Learning
Sophia: Weighted Average
This lesson will introduce the meaning of weighted average, and demonstrate how to solve for the weighted average of a data set. Student watch a video tutorial and then can take an online quiz.
Sophia Learning
Sophia: Weighted Average and Mixture Problems
This lesson will demonstrate how to solve mixture problems using weighted averages. Student can watch a video tutorial and then take an online quiz.
Sophia Learning
Sophia: Weighted Average and Mixture Problems
This lesson will demonstrate how to solve mixture problems using weighted averages. Student watch a video tutorial and then can take an online quiz.
Sophia Learning
Sophia: Mixed Numbers
This lesson will introduce mixed numbers, fractions, decimals and percents. The video describes how to convert mixed numbers, fractions, decimals and percents, and includes real-world practice problems.
Sophia Learning
Sophia: Multiplying Percentages
In this lesson, students are shown how to find the product of two percentages. Students watch a video tutorial and then take an online quiz.
Math Mammoth
Math Mammoth: What Percentage / How Many Percent?
See how to think through problems asking for the percent by first thinking about fractional parts. [6:10]
Math Mammoth
Math Mammoth: How to Solve Basic Percent Word Problems, Part 1
This video demonstrates how to solve problems involving discounts to prices. [6:21]
Math Mammoth
Math Mammoth: How to Solve Basic Percent Word Problems, Part 2
This video demonstrates how to find a percentage of an area by beginning with fractional parts. [4:55]
Math Mammoth
Math Mammoth: How to Calculate Sales Tax
Demonstrates how to determine a total price that includes the sales tax. [8:19]
Math Mammoth
Math Mammoth: How to Calculate the Percent of Change (Increase or Decrease)
A beginning lesson that demonstrates how to find the percentage of change, whether an increase or decrease. [9:47]
Math Mammoth
Math Mammoth: Percent of Change: Applications
Demonstrates how to solve two problems about percentage change, one involving area and the other discounts. [7:17]
Math Mammoth
Math Mammoth: Equations With Percentages: Pre Algebra Lesson
In this lesson, students are shown how to convert percentages into decimal form in order to write simple equations for solving word problems. [5:45]