Question

((ac-a^2)/c^2)/(c-a)/c

Answer 1

$frac{ frac{ac- a^{2}}{ c^{2}}}{ frac{c-a}{c} } = frac{ac- a^{2}}{ c^{2}}:frac{c-a}{c} = frac{a(c- a)}{ c^{2}}*frac{c}{c-a}= frac{a}{c}$