The baker used 1/3 of the eggs for cakes, so 2/3 remains. He used 1/4 of that remainder for cookies.<br><br>[[model:questions/solutions/q4328.png]]<br><br>• Cakes → 1/3 of whole = 4/12<br>• Remainder → 1 − 1/3 = 2/3 = 8/12<br>• Cookies → 1/4 × 2/3 = 2/12 = $$\frac{1}{6}$$<br><br>The baker used 1/6 of the eggs to bake cookies.<br>Check: Cakes 4/12 + Cookies 2/12 + Left 6/12 = 12/12 = 1. ✓