In this question, why do we do Area of circle- Area of square/ Area of circle ?

For the calculation of Percentage change, we do Big-Small/small. What am i missing?

In this question, why do we do Area of circle- Area of square/ Area of circle ?

For the calculation of Percentage change, we do Big-Small/small. What am i missing?

Because we are calculating probability and not percentage change.

Probability of missing the square = (Area outside the square but within the circle) / (Area of the whole circle)

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