AMC 12B 2018 Problem 17

Past Contests AMC 12 AMC 12B - 2018
, , , ,
1

Let p and q be positive integers such that

\dfrac{5}{9}<\dfrac{p}{q}<\dfrac{4}{7}

and q is as small as possible. What is q-p ?

Answer Choices
A. 7
B. 11
C. 13
D. 17
E. 19