5% = 5/100
[tex] \frac{5}{100} \times 20[/tex]
Se simplifica fractia
[tex] \frac{1}{20} \times 20 = 1[/tex]
Deci 5% din 20 = 1
Exact la fel se rezolva si restul:
80% = 80/100
[tex] \frac{80}{100} \times 405 = \frac{8}{10} \times 405 = \frac{4}{5} \times 405[/tex]
Se simplifica 5 cu 405
4 × 81 = 324
[tex] \frac{12}{100} \times 375 = \frac{3}{25} \times 375 = 3 \times 15 = 45[/tex]
