A particle is projected from the ground with an initial velocity making an angle of $60 ^ { \circ }$ with the horizontal. If its kinetic energy at the point of projection is $\mathrm { k } _ { 0 }$ and the kinetic energy at the highest point of the trajectory is $k _ { 1 }$, then find the value of $\frac { k _ { 0 } - k _ { 1 } } { k _ { 0 } }$\
(A) $\frac { 1 } { 2 }$\
(B) $\frac { 2 } { 3 }$\
(c) $\frac { 3 } { 4 }$\
(D) $\frac { 1 } { 5 }$