Answer:
To find out how many batches of cookies the factory made, we need to divide the total amount of flour used (7 1/2 bags) by the amount of flour used per batch (3 3/4 bags).
We can start by converting 7 1/2 bags of flour to a mixed number: 7 1/2 bags = 7 + 1/2 = 7.5 bags
Next, we can convert 3 3/4 bags of flour to a mixed number: 3 3/4 = 3 + 3/4 = 3.75 bags
Then, we can divide the total amount of flour used by the amount of flour used per batch:
7.5 bags / 3.75 bags/batch = 2 batches
Therefore, the factory made 2 batches of cookies yesterday