To find out how much more Jamal ate than his brother, we need to subtract the amount that Jamal's brother ate from the amount that Jamal ate.
- Jamal ate \( \frac{2}{3} \) of his banana.
- His brother ate \( \frac{1}{4} \) of his banana.
Now we need to subtract \( \frac{1}{4} \) from \( \frac{2}{3} \). To do this, we need a common denominator. The least common multiple of 3 and 4 is 12.
Now we can convert both fractions:
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To convert \( \frac{2}{3} \) to twelfths: \[ \frac{2}{3} = \frac{2 \times 4}{3 \times 4} = \frac{8}{12} \]
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To convert \( \frac{1}{4} \) to twelfths: \[ \frac{1}{4} = \frac{1 \times 3}{4 \times 3} = \frac{3}{12} \]
Now we can subtract: \[ \frac{8}{12} - \frac{3}{12} = \frac{8 - 3}{12} = \frac{5}{12} \]
Thus, Jamal ate \( \frac{5}{12} \) more than his brother.