Percentage

by Cathy
(Metamora, MI )





If someone wants to make $10.00 when selling an item and I get 40% how much do I need to add to $10.00 it's not coming out when I add 40% to 10.00

You cannot take 40% of 10 because that someone is not sharing 10.00 with you. He or she is willing to share a bigger amount. So you have to add something to 10 dollars. 40% of the new amount is your share

let x be what we add to 10 dollars and that is your share!

40% of (10 + x)= x

Notice that 40% of the new amount(10+x) has to equal to your share or x. Does that make sense?

0.40 (10+ x) = x
4 + 0.40x = x
4 = x - 0.40x
4 = 0.60x
x = 4/0.60 = 6.6666666
So you have to add 6.66666 to 10 to get 16.666666

Take 40% of 16.6666. Of course, it is equal to 6.66666 and 16.666666- 6.66666= 10
Not so easy problem. Good question Cathy!

Comments for Percentage

Average Rating starstarstarstarstar

Click here to add your own comments

Apr 15, 2015
Rating
starstarstarstarstar
SlimQuick
by: SlimQuick

Another great post, I appreciate all the work you put into this site, helping out others with your fun and creative works.

Dec 24, 2014
Rating
starstarstarstarstar
Excellent!
by: Shaun Neruda

That was an interesting problem. I could not figure out the solution on my own. I always had trouble dealing with the calculations based on percentages. Anyway, you have given an interesting account. I’m quite impressed with the explanation.


Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Basic math word problem.





Recent Articles

  1. How to estimate fractions

    Dec 11, 17 08:45 AM

    Learn how to estimate fractions with this easy to follow lesson.

    Read More

New math lessons

Your email is safe with us. We will only use it to inform you about new math lessons.

            Follow me on Pinterest





Recent Lessons

  1. How to estimate fractions

    Dec 11, 17 08:45 AM

    Learn how to estimate fractions with this easy to follow lesson.

    Read More

  Our Top Pages

Formula for percentage

Compatible numbers

Basic math test

Basic math formulas

Types of angles

Math problem solver

Algebra word problems

Surface area of a cube

Finding the average 

Scale drawings

Tough Algebra Word Problems.

If you can solve these problems with no help, you must be a genius!


Everything you need to prepare for an important exam!

K-12 tests, GED math test, basic math tests, geometry tests, algebra tests. 


Real Life Math Skills

Learn about investing money, budgeting your money, paying taxes, mortgage loans, and even the math involved in playing baseball.

 Recommended

Scientific Notation Quiz

Types of Angles Quiz

Graphing Slope Quiz

Adding and Subtracting Matrices Quiz  

Factoring Trinomials Quiz 

Solving Absolute Value Equations Quiz  

Order of Operations Quiz