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About Joe Engels
Expertise
I can answer most questions regarding inferential and descriptive statistics, algebra, pre-calculus, and calculus. I can also sometimes answer questions about number theory and "proving theorums" but that sometimes gets difficult without a one on one sit down.

Experience
2002 BS in Applied Mathematics 2002 BS in Statistics

Education/Credentials
2002 BS in Applied Mathematics 2002 BS in Statistics

You are here: Experts > Science > Mathematics > Probability & Statistics > percentage

Probability & Statistics - percentage

Expert: Joe Engels - 7/6/2008

Question
I had a question on my math quiz that goes like this:

Mr. R's monthly salary is $2500. His monthly salary is $520 more than his wife's. What is the percentage difference between his salary and his wife's?

The given solution is: 520/2500*100=20.8%

Why is it not 520/1980*100=26.26%???

mukund

Answer
Why is it not 520/1980*100=26.26%???

You can also do 1-(1980/2500)*100

The point is you want to find the percent difference between Mr. R's $2500 per month salary and his wifes $1980 per month salary.

In your equation, you are finding the percent difference between $520 and someones salary that is $1980.

Hope this helps.

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