Answer
$0.66$ or, $66.6 \%$
Work Step by Step
The probability can be computed as: $P(A|B)=\dfrac{P( A \text{and} B)}{P(B)}$
After substituting the values, we get
$P(A|B)=\dfrac{0.5}{0.75}=0.66$ or, $66.6 \%$
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