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 4 into thirds. 4 = 12/3.
4	=	\(\dfrac{12}{3}\)
Subtract	=	\(\dfrac{12}{3} - \dfrac{2}{3} = \dfrac{10}{3}\)
Convert to a mixed number: 10/3 = 3 whole and 1/3.
As mixed number	=	\(3\dfrac{1}{3}\)