Answer:
3/7 bags of flour
Explanation:
Things we know:
Carmen uses 2/7 bag of flour to make 1/2 of a batch
To make 1 batch she will use :
2/7 flour/1/2 batch = x flour/1batch
2/7 = 1/2x
1/7 = x
We need 1/7 flour to make 1 batch of cookie
If 1 batch uses 1/7 of the flour then 3 batchs will need:
1/7 flour/1batch = x flour/3 batch
1/7 * 3 = x
3/7 = x
Therefore we need 3/7 flour to make 3 batches of cookies.