Question

Alguém pode me ajudar?
Quanto é:
a) 15% de 80?
b) 70% de 30?
c) 150% de 70?
d) 100% de 40?​

Answer 1

Resposta:

a)15/100*80=15*80=1200/100=12

b)70/100*30=70*30=2100/100=21

c)150/100*70=150*70=10500/100=105

d)100/100*40=100*40=4000/100=40

Answer 2

Resposta:

$a) \: \: 15\%80 = \\ \\ \frac{15}{100} \times 80 = \\ \\ \frac{3}{20} \times 80 = \\ \\ 3 \times 4 = \\ \\ 12$

$b) \: \: 70\%30 = \\ \\ \frac{70}{100 } \times 30 = \\ \\ \frac{70}{10} \times 3 = \\ \\ \frac{210 }{10} = \\ \\ 21$

$c)150\%70 = \\ \\ \frac{150}{100} \times 70 \\ \\ \frac{150}{10 } \times 7 = \\ \\ \frac{1050}{10} = \\ \\ 105$

$d) \: \: 100\%40 = \\ \\ \frac{100}{100} \times 40 = \\ \\ 1 \times 40 = \\ \\ 40$