My Math Forum  

Go Back   My Math Forum > High School Math Forum > Elementary Math

Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

LinkBack Thread Tools Display Modes
November 14th, 2007, 01:18 PM   #1
Joined: Nov 2007

Posts: 8
Thanks: 0

Help? Percent of Change!

I know I should know this at my age, but I am REALLY bad with Algebra. I am learning about percents and proportions, and I REALLY need to pass this next test, or I go to a continuation school. Help anybody?
Verridith is offline  
November 15th, 2007, 07:55 PM   #2
Global Moderator
Joined: Dec 2006

Posts: 20,107
Thanks: 1907

Change = new value minus old value.

Fractional change = change divided by old value.

Example: new value 19, old value 20. Change is -1. Fractional change is -1/20.

100% means 1. Multiplying by 1 leaves a value the same. Hence the fractional change can be multiplied by 100%. Result: fractional change of -1/20 is the same as a change of -(1/20) × 100%, i.e., a change of -5%. When the percent sign is used, you can assume "change" is fractional change, expressed as a percentage.

You need a suitable texbook; do you have one already?
skipjack is offline  
November 27th, 2007, 01:35 PM   #3
Joined: Nov 2007

Posts: 8
Thanks: 0

Well, I have a textbook, but the examples aren't that good. The textbook that I use is Algebra concepts and Applications, and SOME of the examples are REALLY good, but others just DON'T cut it.

Thank you!

Do you know of any textbooks that would be better for me to refer to? Or any other math help sites? But I do NOT have that much money, so I can't buy a tutor site sub.
Verridith is offline  
November 29th, 2007, 05:07 AM   #4
Joined: Nov 2007

Posts: 4
Thanks: 0

I can probaly walk you through a problem or two if you show exactly what types of problems you need to solve... i forget what everything is called, its been awile.
Quasi Monomial is offline  

  My Math Forum > High School Math Forum > Elementary Math

change, percent

Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
16 is what percent of 80? zain Elementary Math 9 April 20th, 2015 02:34 AM
what percent of xy Rfeynman16 Algebra 2 January 7th, 2014 03:28 PM
Geometry percent change Rfeynman16 Geometry 10 January 2nd, 2014 09:13 PM
Percent Change Question moreyS Algebra 3 February 12th, 2012 08:31 PM
Find previous weights from current weights & percent change billiboy Applied Math 4 June 16th, 2009 12:26 AM

Copyright © 2019 My Math Forum. All rights reserved.