Question

presiso da 10 e 11 pfv

Answer 1

1 ) fórmula de porcentagem :

p = porcentagem
i= taxa
c= capital

P= i . c / 100

a)
35% de 120=>

P= 35×120/100%=>

P= 42

b) 25 % de ◼= 17

25%◼= 100×17
◼=100× 17/25
◼= 68

c)◼% de 90=63

90◼/100=63/1

◼=70


d) 40% de 723

P= 40×723/100

p=289.2

e) 75% de X = 1800

75.x/100%=1800/1

x=2400

f) X % de 800 é.

X. 800/100%=0.32/1
x= 0,04


11)

a )

3780/x= 100%
x= 3402

b)

3780-3402= 378