Чему равна сумма дробей

\(\displaystyle \frac{2}{5}+\frac{2}{5}=\,?\)

• \(\displaystyle \frac{2}{5}\)
• \(\displaystyle \frac{4}{5}\)
• \(\displaystyle \frac{3}{10}\)
• \(\displaystyle \frac{3}{5}\)