Question

3. DETERMINE:


a) 10% de 50


b) 20% de 260


c) 15% de 180


d) 25% de 1200

Answer 1

Resposta:

O de representa multiplicação.

$100 \% = \dfrac{100}{100}$

a)

$10 \% \: de \: 50? \\ \\ \frac{1 \red{0}}{1 \red{00}} \times 5 \red{0} = \green{ 5}$

b)

$20\% \: de\: 260?\\\\ \frac{2 \red{0}}{1 \red{00}} \times 26 \red{0} = 2 \times 26 = \green{52}$

c)

$15\% \:de \:180?\\ \\\dfrac{15}{1 0 \red{0}} \times 18 \red{0} \\ \\ \dfrac{15 \div 5}{10 \div 5} \times 18 = \\ \\ \dfrac{3}{2} \times 18 = \\ \\ 3 \times 9 = \green{27}$

d)

$25\% \: de\:1200?\\\\ \dfrac{25}{1 \red{00}} \times 12 \red{00} \\ \\ 25 \times 12 = \green{ 300}$

Bons Estudos!