3. Cole spent some time working on his history homework. Then, he spent \( \frac{5}{12} \) hour working on his Spanish homework. Cole spent 1 hour on homework. What fraction of an hour did Cole spend on history? Explain. A \( \frac{2}{12} \) hour; because \( \frac{5}{12}-\frac{3}{12}=\frac{2}{12} \) B \( \frac{2}{12} \) hour because he spent the same amount of time on Spanish as he did History. C \( \frac{7}{12} \) hour; because \( \frac{12}{12}-\frac{5}{12}=\frac{7}{12} \) D \( \frac{12}{12} \) hour; because he spent an hour on homework

Cole spent a total of 1 hour on homework, which is equivalent to \( \frac{12}{12} \) hours. Since he dedicated \( \frac{5}{12} \) hours to his Spanish homework, we can find the time spent on history homework by subtracting this from the total hours. So, \( \frac{12}{12} - \frac{5}{12} = \frac{7}{12} \) hours. Therefore, the correct answer is C \( \frac{7}{12} \) hour. To tackle this problem efficiently, subtraction is the key! Remember, when dealing with fractions, always ensure they have the same denominator before you perform operations. A common mistake is forgetting to do this, which can lead to incorrect answers. So keep your fractions organized and work through them step by step—your homework will thank you!