Solve Simplify the Answer $16 \frac { 1 } { 2 }$

Multiple Choice

Solve. Simplify the answer.
-Last week, Samantha ran 18 miles. This week, she ran $16 \frac { 1 } { 2 }$ miles. How much more did she run last week?

A) $25 \frac { 1 } { 2 } \mathrm { mi }$
B) $1 \frac { 7 } { 11 } \mathrm { mi }$
C) $1 \frac { 1 } { 2 } \mathrm { mi }$
D) $34 \frac { 1 } { 2 } \mathrm { mi }$