If you would like to know how much flour do you need to make the Naan bread, you can calculate this using the following steps:
The Naan bread requires 1/3 the amount of flour as the pita bread.
You need 2 3/4 cups of flour to make the pita bread.
2 3/4 = 11/4 cups of flour (the pita bread)
1/3 of 11/4 = 1/3 * 11/4 = 11/12 cups of flour (the Naan bread)
Result: You need 11/12 cups of flour to make the Naan bread.