Ethan gave 1/3 to his wife, so 2/3 remains. Food takes 2/5 of that remainder, transport takes 1/4 of what is left after food.<br><br>[[model:questions/solutions/q4327.png]]<br><br>• Wife → 1/3 of whole = 10/30<br>• Remainder → 1 − 1/3 = 2/3 = 20/30<br>• Food → 2/5 × 2/3 = 4/15 = 8/30<br>• After food → 20/30 − 8/30 = 12/30 = 2/5<br>• Transport → 1/4 × 12/30 = 3/30 = 1/10<br>• Money left → 12/30 − 3/30 = 9/30 = $$\frac{3}{10}$$<br><br>Ethan had 3/10 of his original money left.<br>Check: Wife 10/30 + Food 8/30 + Transport 3/30 + Left 9/30 = 30/30 = 1. ✓