Difference between revisions of "2012 AMC 12B Problems/Problem 4"

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==Solution==
 
==Solution==
  
So convert everything to dollars; 400(euros) x 1.3 = 520 dollars. now, 520 divided by 500 = 1.04, which means a value that is 4% greater; B.
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The ratio <math>\frac{400 \text{ euros}}{500 \text{ dollars}}</math> can be simplified using simple dimensional analysis:
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<math>\frac{400 \text{ euros}}{500 \text{ dollars}} \cdot \frac{1.3 \text{ dollars}}{1 \text{ euro}} = \frac{520}{500} = 1.04</math>, which means a value that is greater by <math>\boxed{ \textbf{(B)} \ 4 }</math> percent.
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== See Also ==
 
== See Also ==
  
 
{{AMC12 box|year=2012|ab=B|num-b=3|num-a=5}}
 
{{AMC12 box|year=2012|ab=B|num-b=3|num-a=5}}

Revision as of 22:41, 12 January 2013

Problem

Suppose that the euro is worth 1.3 dollars. If Diana has 500 dollars and Etienne has 400 euros, by what percent is the value of Etienne's money greater that the value of Diana's money?

$\textbf{(A)}\ 2\qquad\textbf{(B)}\ 4\qquad\textbf{(C)}\ 6.5\qquad\textbf{(D)}\ 8\qquad\textbf{(E)}\ 13$

Solution

The ratio $\frac{400 \text{ euros}}{500 \text{ dollars}}$ can be simplified using simple dimensional analysis:

$\frac{400 \text{ euros}}{500 \text{ dollars}} \cdot \frac{1.3 \text{ dollars}}{1 \text{ euro}} = \frac{520}{500} = 1.04$, which means a value that is greater by $\boxed{ \textbf{(B)} \ 4 }$ percent.


See Also

2012 AMC 12B (ProblemsAnswer KeyResources)
Preceded by
Problem 3
Followed by
Problem 5
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
All AMC 12 Problems and Solutions
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