Karl had 2 whole cakes. He ate \(\frac{1}{3}\) of one cake. Find the fraction left.

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• 2 cakes = \(\frac{6}{3}\) cakes
• After eating \(\frac{1}{3}\): \(\frac{6}{3} - \frac{1}{3} = \frac{5}{3}\)
• \(\frac{5}{3} = 1\frac{2}{3}\) cakes left

\(1\frac{2}{3}\) of the cakes were left.
Check: \(1\frac{2}{3} + \frac{1}{3} = 2\) ✓

Final Answer: \(1\frac{2}{3}\)