Question

halle el 20% de 80 mas 25% de 40 menos el 10% de 70

Answer 1

$20\%\times80+25\%\times40-10\%\times70 \\ \\ = \frac{20}{100} \times80+ \frac{25}{100}\times40- \frac{10}{100}\times70 \\ \\ = \frac{1600}{100}+ \frac{1000}{100} - \frac{700}{100} \\ \\ = \frac{1900}{100} \\ \\ =19$