Imagine you’re at a party, and someone says, “Hey, can you double this punch recipe? It calls for 2/3 cup of rum.” You, the hero, confidently pour four 1/3 cups of rum into the bowl. That’s two 2/3 cups—1 1/3 cups of rum. But then someone adds ice, and the punch becomes a legal liability. You don’t want that. Stick to the math, not the vibe.
If you mess this up, don’t panic. Just remember: two 2/3 cups always equals 1 1/3 cups. Write it on a sticky note and put it on your fridge. Future you will high-five past you.
