27 % a = 81 % b
=> [tex]\frac{27}{100} * a = \frac{81}{100} * b[/tex]
=> 0,27a = 0,81b
=> [tex]\frac{a}{b} = \frac{0,81}{0,27} = \frac{81}{27} = 3[/tex]
Răspuns: c)
