Какая из данных разностей наибольшая?

• \(\dfrac{6}{7}\) - \(\dfrac{1}{3}\)
• \(\dfrac{1}{3}\) - \(\dfrac{2}{7}\)
• \(\dfrac{6}{7}\) - \(\dfrac{2}{5}\)
• \(\dfrac{2}{5}\) - \(\dfrac{2}{7}\)