in this problem, the unknown amount is that of the chocolate chips, so let's call that x.
x = chocolate chips
we know two things about the flour, the amount and its relation to the amount of chips
flour = 3 2/3 cups
flour = 2 3/4 times the amount of chocolate chips, or 2 3/4 x
now we can set up the equation and solve for x, which is the amount of chocolate chips:
2 3/4 x = 3 2/3
11/4 x = 11/3
divide both sides by 11/4 to isolate the variable
x = 11/3 ÷ 11/4
x = 11/3 * 4/11
x = 4/3 or 1 1/3 cups
hope this helps!