We can calculate 
\[E\], the amount of euros that has the same value as 
\[D\] U.S. dollars, using the equation 
 
\[E=\dfrac{17}{20}D\].
How many euros have the same value as 
\[1\] U.S. dollar?
 euros
How many U.S. dollars have the same value as 
\[1\] euro?
 dollars

Given the equation:

\[
E = \frac{17}{20}D
\]

where \( E \) is the amount of euros, and \( D \) is the amount of U.S. dollars.

### 1. How many euros have the same value as 1 U.S. dollar?

To find how many euros correspond to 1 U.S. dollar, substitute \( D = 1 \) into the equation:

\[
E = \frac{17}{20} \times 1 = \frac{17}{20} \text{ euros}
\]

\[
E = 0.85 \text{ euros}
\]

So, 1 U.S. dollar is equivalent to **0.85 euros**.

### 2. How many U.S. dollars have the same value as 1 euro?

To determine how many U.S. dollars correspond to 1 euro, we need to invert the given relationship:

\[
D = \frac{20}{17}E
\]

Now, substitute \( E = 1 \):

\[
D = \frac{20}{17} \times 1 = \frac{20}{17} \text{ dollars}
\]

\[
D \approx 1.1765 \text{ dollars}
\]

So, 1 euro is equivalent to approximately **1.18 U.S. dollars**.

Would you like more details or have any questions?

Here are some related questions you might find helpful:

1. How do you convert between different currencies using exchange rates?
2. What is the importance of understanding currency conversion in international trade?
3. How do you calculate the inverse of a ratio?
4. How does currency exchange affect purchasing power?
5. What are some practical applications of currency conversion in travel?

**Tip:** When working with currency conversions, always keep track of the units to avoid confusion between the different currencies.

Explore how to convert currencies using the relationship E = (17/20)D. Learn how many euros are equivalent to 1 U.S. dollar and how many U.S. dollars equal 1 euro. Detailed solutions and calculations provided.

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