*[tex] \frac{12}{100} [/tex]*18000 = [tex] \frac{12*18000}{100} [/tex] = [tex] \frac{216000}{100} [/tex] = 216018000-2160 = 15840 pretul dupa reducerea cu 12%
[tex] \frac{9}{100} [/tex]*18000 = [tex] \frac{9*18000}{100} [/tex] = [tex] \frac{162000}{100} [/tex] = 162018000+1620 = 19620 pretul dupa majorarea cu 9%