b) \( \frac{2}{7}+\frac{6}{14}= \)

First, let's find a common denominator for the two fractions. The denominator of \( \frac{2}{7} \) is 7, and for \( \frac{6}{14} \), it's 14. Since 14 is a multiple of 7, we can rewrite \( \frac{2}{7} \) as \( \frac{4}{14} \) (by multiplying both the numerator and denominator by 2). Now we can add them: \[ \frac{4}{14} + \frac{6}{14} = \frac{10}{14} \] To simplify, divide both the numerator and denominator by their greatest common divisor, which is 2: \[ \frac{10 \div 2}{14 \div 2} = \frac{5}{7} \] So, \( \frac{2}{7} + \frac{6}{14} = \frac{5}{7} \).