Hey there!!
Let us take the total cups of flour = 3 1/3
Cups we have = 1/3
Cups we need = x
1/3 + x = 3 1/3
x = 3 1/3 - 1/3
x = 10/3 - 1/3
x = 9/3
x = 2
We will need 2 more cups
Hope helps!
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