Question

1 - Calcule as porcentagens
a) 18% de 900,00
b) 23% de 8500,00
c) 13% de 7500,00
d) 20% de 30% de 3000,00
e) 10% de 40% de 4000,00 ?

Answer 1

a)162 b)1995 c)975 d)180 e)160

Answer 2

1)
$a)\frac{18}{100}\cdot{900}=\boxed{162}\\ b)\frac{23}{100}\cdot{8500}=\boxed{1955}\\ c)\frac{13}{100}\cdot{7500}=\boxed{975}\\ d)\frac{30}{100}\cdot{3000}=900\cdot{\frac{20}{100}}=\boxed{180}\\ e)\frac{40}{100}\cdot{4000}=1600\cdot{\frac{10}{100}}=\boxed{160}$

Espero ter ajudado :)