Carlos spent \( 1 \frac{1}{4} \) hours doing his math homework. He spent \( 1 \frac{1}{4} \) as much time practicing piano. How many hours did Carlos spend practicing piano? hours

Carlos spent \( 1 \frac{1}{4} \) hours on his math homework, which is equivalent to \( \frac{5}{4} \) hours. To find out how much time he spent practicing piano, we need to multiply the time he spent on his homework by \( 1 \frac{1}{4} \) (or \( \frac{5}{4} \)). So, we calculate \( \frac{5}{4} \times \frac{5}{4} = \frac{25}{16} \) hours. When converted to a mixed number, \( \frac{25}{16} \) is equal to \( 1 \frac{9}{16} \) hours. Therefore, Carlos spent \( 1 \frac{9}{16} \) hours practicing piano. Hence, Carlos spent \( 1 \frac{9}{16} \) hours practicing piano.