Tell What Percent Grade Is Described $5 \frac { 17 } { 15 }$

Tell what percent grade is described. A wheelchair ramp with a ratio of 1 to 17.

A) $5 \frac { 17 } { 15 }$ %
B) $5 \frac { 3 } { 15 }$ %
C) $5 \frac { 15 } { 6 }$ %
D) $5 \frac { 15 } { 17 }$ %
E) $5 \frac { 15 } { 1 }$ %