A bread recipe calls for 3 14 cups of flour If you only have 2 18 how much more is needed?

The recipe calls for 3 1/4 cups of flour. You only have 2 1/8 cups. To find out how much more flour you need, you can subtract the amount you have from the amount you need:

3 1/4 - 2 1/8 = 1 1/8

So, you need 1 1/8 more cups of flour.