can you answer these? I have the answer key, but dont know how to do them.

a$\mathrm{.}10\mathrm{.}5\%$

b$\mathrm{.}0\mathrm{.}9$

c$\mathrm{.}0\mathrm{.}9$

d$\mathrm{.}7\mathrm{.}5\%$

e$\mathrm{.}7\mathrm{.}5\%$

f$\mathrm{.}3\%$