To subtract a fraction from a whole number, convert the whole number to a fraction with the same denominator, then subtract.

Convert the whole number 2 into sevenths. 2 = 14/7.
2	=	\(\dfrac{14}{7}\)
Subtract	=	\(\dfrac{14}{7} - \dfrac{3}{7} = \dfrac{11}{7}\)
11/7 is already in simplest form.