Back To Course

Algebra I: High School20 chapters | 168 lessons | 1 flashcard set

Are you a student or a teacher?

Start Your Free Trial To Continue Watching

As a member, you'll also get unlimited access to over 75,000 lessons in math, English, science, history, and more. Plus, get practice tests, quizzes, and personalized coaching to help you succeed.

Free 5-day trial
Your next lesson will play in
10 seconds

Lesson Transcript

Instructor:
*Jennifer Beddoe*

Knowing how to convert a percent to a decimal can be a useful skill in many different situations. This lesson will show you how to perform that conversion and places where this skill will be helpful.

The other day I was starving, had no food in the house and my wallet was empty. I dug through the pockets of all my pants and grabbed all the change I could find from other places around the house and came up with a total of $4.37.

I hopped in the car and drove to the nearest burger place. The price of a combo is $3.99; it's going to be close. I know that the sales tax is seven percent. So, I have everything I need to figure out if I found enough change to get that combo for dinner.

In order to figure out the problem above, I first have to convert the percent sales tax to a decimal. Before we can do that, we need to talk about what 'percent' means. The word '**percent**' means 'per one hundred,' so 50% is 50 per 100, or 50/100. To convert this to a decimal, simply divide the percent by 100 and drop the percent symbol (%). 50/100 = 0.50. An even easier way to do this is to just move the decimal place to the left two places.

Now, how on Earth is that going to help me figure out if I have enough money to buy dinner? Well, the first step is to convert the seven percent sales tax to a decimal. Then I can multiply it to the cost of the combo ($3.99) to determine the amount of the tax. When I add the tax to the price, I will get the total amount I have to pay.

- Convert seven percent to a decimal. The easy way to do this is to move the decimal point to the left two places, which gives me 0.07.
- Multiply 0.07 * 3.99. The amount of sales tax I will have to pay is 0.28, or 28 cents.
- Add the tax amount to the price of the combo to get the total. 3.99 + 0.28 = 4.27.

The total amount I will have to pay to eat dinner is $4.27, and my $4.37 is enough to cover it.

The word '**percent**' means 'per one hundred,' and so to convert a percent to a decimal, all you need to do is divide it by 100. You can also just move the decimal place over two spaces to the left to obtain the decimal form of a percent. Knowing how to convert a percent to a decimal can be helpful when trying to figure out discounts, sales tax or how much of a tip to leave your server.

After watching this lesson, you should be able to understand how to convert percents to decimals and apply the skill to real-world situations.

To unlock this lesson you must be a Study.com Member.

Create your account

Are you a student or a teacher?

Already a member? Log In

BackDid you know… We have over 160 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

You are viewing lesson
Lesson
2 in chapter 2 of the course:

Back To Course

Algebra I: High School20 chapters | 168 lessons | 1 flashcard set

- GRE Information Guide
- Computer Science 310: Current Trends in Computer Science & IT
- Earth Science 105: Introduction to Oceanography
- Computer Science 331: Cybersecurity Risk Analysis Management
- Computer Science 336: Network Forensics
- Practical Applications for Excel
- Practical Applications in Business Law
- Practical Applications for How to Network
- Practical Application for Technical Writing
- Practical Applications for Workplace Communications with Computers
- MOGEA Test Score Information
- ASWB Prep Product Comparison
- What is the MOGEA Test?
- TASC Exam Registration Information
- How to Study for the TASC Exam
- TASC Test Accommodations
- TASC: Test Cost

- Stone Age Weapons: Arrows & Spears
- How to Use the Quadratic Formula to Find Roots of Equations
- Java String Constant Pool: Concept & Mechanism
- Java: Dynamic Arrays
- Practical Application: Analyzing the Use of Search Engines, Keywords & Web Portals
- Using the Built-In Help Function in R Programming
- Ocean Pollution: Types & Impact
- Practical Application: Understanding Debt Collection & Repossession Rights
- Reading & Writing 6 Digit Numbers: Quiz & Worksheet for Kids
- Quiz & Worksheet - Triceps Brachii Muscle Anatomy
- Quiz & Worksheet - Digital Art
- Quiz & Worksheet - Stone Age Technologies
- Quiz & Worksheet - Cellular Respiration in Mitochondria
- Flashcards - Measurement & Experimental Design
- Flashcards - Stars & Celestial Bodies

- English Literature for Teachers: Professional Development
- AP European History: Homework Help Resource
- High School Psychology: Homeschool Curriculum
- 8th Grade World History Textbook
- MCAT Prep: Help and Review
- NES: Personal Finance
- NES Essential Academic Skills Writing: Nouns
- Quiz & Worksheet - Pros & Cons of Various Experimental Designs
- Quiz & Worksheet - Predicting the Spontaneity of a Reaction with Free Energy
- Quiz & Worksheet - Main Measures of Central Tendency
- Quiz & Worksheet - Quasi-Experimental Designs Features & Types
- Quiz & Worksheet - Researcher Variables that Affect Internal Validity

- How Dialogue Provokes a Decision
- What Is CPR? - Definition, History & Purpose
- Special Education Certification in Texas
- Tennessee Science Standards
- Supply and Demand Activities for Kids
- Reign of Terror Lesson Plan
- Reading Food Labels Lesson Plan
- Homeschooling in Utah
- AP Biology Exam Date
- The Vietnam War After American Involvement: Learning Objectives & Activities
- Georgia Science Standards
- NGSS Life Science for Middle School

- Tech and Engineering - Videos
- Tech and Engineering - Quizzes
- Tech and Engineering - Questions & Answers

Browse by subject