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Basic Math/Percentage word problem

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Question
Hi, Lynn
If I know that Roseville is 116% more expensive than Sacramento, and I know that Sacramento is 29% more expensive than Mexico City , how do I figure how much more expensive Roseville is than Mexico City?  Thanks

Answer
Let's say Mexico City costs x, so Sacramento costs (.29x+x) and
Roseville costs 1.16(.29x+x)+(.29x+x).  

Simplifying, Mexico City = x, Sacramento = 1.29x and Roseville = 2.79x, therefore, Roseville is 279% more expensive than Mexico City.

Here is the math for Roseville
1.16(1.29x)+(1.29x)
1.49x + 1.29x = 2.79x (rounded from 2.786)

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Lynn Houston

Expertise

I can answer questions in basic algebra and any grade school math.

Experience

Love math, currently helping my nephew get through Intermediate Algebra.

Education/Credentials
I majored in Math Ed in college (but decided not to teach), so have over 40 credits of math.

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