It seems like you're working with an expression involving square roots. However, the expression as written is a bit unclear. I'll interpret it as:

\[
\frac{\sqrt{2}}{\sqrt{5}} - \frac{1 \cdot \sqrt{2}}{\sqrt{5}} - 1
\]

But this simplifies immediately to:

\[
\frac{\sqrt{2}}{\sqrt{5}} - \frac{\sqrt{2}}{\sqrt{5}} - 1 = -1
\]

So, the expression simplifies to \(-1\).

Please clarify if you intended a different expression.

Would you like more details, or do you have any other questions?

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Learn how to simplify the square root fraction expression √2/√5 - 1 step-by-step. This problem involves basic algebraic manipulation and simplification of square root fractions. Suitable for high school students.

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