Algebra I: Working with ratios
This is a free lesson from our course in Algebra I
 
   
In this lesson you'll learn how to work with ratios. A ratio is a comparison of two quantities -- the ratio of number x to number y is x/y, where y  0. If two quantities are in the ratio a : b, then taking x as a common multiple, the first quantity could be ax and the second one could be bx.For example, express 28/36 as a ratio. You can write it as, 28/36 = 7/9 (dividing both numerator and denominator by 4) or 7:9. Let's see one more example: What is the ratio of men to boys if there are 15 boys and 3 men?
Ans. 3 men / 15 boys = 1 men / 5 boys or 1:5 (read 1 to 5).
You'll also learn here how to compare more than two quantities at a time and then combine their ratios. For example, if a : b = 3 : 4 and b : c = 6 : 7, then a : b : c = 3 : 4 : 14/3. Once you go through the instructor's explanation in the video above, it'll be easy for you to understand how the above ratio was determined.
<h2> Working with ratios - Watch video (Algebra I)</h2> <p> ratio, working with ratio, comparison, quantities, number, common multiple, compare, combining, online algebra, practice questions, quizzes, online math</p> <p> If two quantities are in the ratio a: b, then taking x as a common multiple, the first quantity could be ax and the second one could be bx.</p>
Other useful lessons:
Working with polynomials
Winpossible's online math courses and tutorials have gained rapidly popularity since their launch in 2008. Over 100,000 students have benefited from Winpossible's courses... these courses in conjunction with free unlimited homework help serve as a very effective math-tutor for our students.
- All of the Winpossible math tutorials have been designed by top-notch instructors and offer a comprehensive and rigorous math review of that topic.
- We guarantee that any student who studies with Winpossible, will get a firm grasp of the associated problem-solving techniques. Each course has our instructors providing step-by-step solutions to a wide variety of problems, completely demystifying the problem-solving process!
- Winpossible courses have been used by students for help with homework and by homeschoolers.
- Several teachers use Winpossible courses at schools as a supplement for in-class instruction. They also use our course structure to develop course worksheets.
 
       
     
 Copyright © Winpossible, 2010 - 2011
Best viewed in 1024x768 & IE 5.0 or later version