Answer:
The answer to your question is Wendy and Bob are correct.
Explanation:
Data
Wendy said 2/3 of the penguins had a scarf.
Bob said 6/9 of the penguins had a scarf.
Process
Before we decide, we must check if the fractions are equivalent, we must simplify both fractions
Wendy's fraction is not possible to simplify because it is in its simplest expression.
But we can simplify Bob's fraction dividing both numerator and denominator by 3
Finally, we observe that both fractions are equivalent and conclude that Wendy and Bob are right.