Calculate these percentages.

a) [[$ 35 \% $]] of [[$ 15 $]] kg is kg

b) [[$ 66 \% $]] of [[$ 230 $]] cm is cm

c) [[$ 12 \% $]] of [[$ 67 $]] m is m

d) [[$ 7 \% $]] of [[$ 140 $]] ml is ml

e) [[$ 4 \% $]] of [[$ 5 $]] km is km