8 3/4 : 2 2/8 x 0,80

[tex]8 \frac{3}{4} \div 2 \frac{2}{8} \times 0.80 \\ \frac{35}{4} \: \div \frac{18}{8} \times \frac{80}{100} \\ \frac{35}{4} \: \times \frac{8}{18} \times \frac{8}{10} \\ \frac{2240}{720} \\ 3 \frac{80}{720} \\ 3 \frac{1}{9} [/tex]

8 3/4 : 2 2/8 × 0,80
= 35/4 : 18/8 × 80/100
= 35/4 × 8/18 × 80/100
= 35/4 × 4/9 × 4/5
= 560/180 => pec.biasa
= 3 20/180
= 3 1/9 => pec.campuran
= 3,11 => pec.desimal