(1- \frac{ 1 }{ \pi }
Evaluate
\frac{\pi -1}{\pi }\approx 0.681690114
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\frac{\pi }{\pi }-\frac{1}{\pi }
To add or subtract expressions, expand them to make their denominators the same. Multiply 1 times \frac{\pi }{\pi }.
\frac{\pi -1}{\pi }
Since \frac{\pi }{\pi } and \frac{1}{\pi } have the same denominator, subtract them by subtracting their numerators.
Examples
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