testing header
Math Goodies is a free math help portal for students, teachers, and parents.
Free Math
Newsletter
 
 
Interactive Math Goodies Software

Buy Math Goodies Software
testing left nav
Math Forums @ Math Goodies
Math Forums @ Math Goodies
Home | Profile | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Homework Help Forums
 Basic Math and Pre-Algebra
 Solutions & Percentages
 New Topic  Topic Locked
 Printer Friendly
Author Previous Topic Topic Next Topic  

KelaKlub
New Member

USA
2 Posts

Posted - 09/24/2007 :  16:16:17  Show Profile
The following question comes from a practise test...

--------------------------------
One fourth of a solution that was 10 percent sugar by weight was replaced by a second solution resulting in a solution that was 16 percent sugar by weight.
The second solution was what percent sugar by weight?
--------------------------------

The answer is given to be 34%.

I assumed a 100 part solution so that means it has 10 parts sugar.

1/4 meaning 25 parts was replaced with another solution, so we now have 16 parts sugar.

Thats as far as I can go. Any help would be appreciated.
Go to Top of Page

Ultraglide
Advanced Member

Canada
299 Posts

Posted - 09/24/2007 :  16:51:24  Show Profile
If you take a quarter of the original solution away you have 7.5 parts out of 75. When combined with the new solution giving 16%, you have added 16-7.5 or 8.5%. Taking this as a percent of the new solution, i.e. 8.5% out of one quarter gives 34% (multiply by 4 to get 100%)
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Topic Locked
 Printer Friendly
Jump To:
Math Forums @ Math Goodies © 2000-2004 Snitz Communications Go To Top Of Page
This page was generated in 0.03 seconds. Snitz Forums 2000
testing footer
About Us | Contact Us | Advertise with Us | Facebook | Blog | Recommend This Page




Copyright © 1998-2014 Mrs. Glosser's Math Goodies. All Rights Reserved.

A Hotchalk/Glam Partner Site - Last Modified 26 Nov 2014