Javier is making a cake for a party. the recipe calls for 2 3 4 234 cups of flour, but he wants to triple the recipe. he guessed and put in 7 cups of flour. how many more cups of flour should he have used?

The correct question is
Javier is making a cake for a party. The recipe calls for 2 3/4 cups of flour, but he wants to triple the recipe. He guessed and put in 7 cups of flour. How many more cups of flour should he have used?

we know that
2 3/4 cups of flour> (2*4+3)/4> 11/4 cups
if he wants to triple the recipe> 3*(11/4)> 33/4 > 8 1/4 cups required

8 1/4-7=1 1/4 cups

the answer is
1 1/4 cups