Răspuns:
80%=8/10=4/5
[tex] \frac{80\%}{100} = \frac{ \frac{4}{5} }{100} = \frac{4}{5} \times \frac{1}{100 } = \frac{1}{5} \times \frac{1}{25} = \frac{5}{25} = \frac{1}{5} [/tex]
