2 is also the fraction 2/1, so the question is: [tex] \frac{1}{3} / \frac{2}{1} [/tex] when dividing fractions, you take the second fraction flip the top number (numerator) with the lower number (denominator) and then change the division sign to multiplication: [tex] \frac{1}{3} * \frac{1}{2}[/tex] = [tex] \frac{1}{6} [/tex] or one sixth