Question

1/calcule as porcentagens
A 16% de R$ 230,00
B31% de R$ 140,00
C 45% de R$ 640,00
D 95% de R$ 1200,00
E 10% de R$ 35,20

Answer 1

Oi...

Resolução:

Regra de três.

a) 16% de R$ 230,00

100%--------230

16% ----------x

100.x = 16.230

100x = 3680

x = 3680/100

x = 36,8

b) 31% de R$ 140,00

100%--------140

31%----------x

100.x = 31.140

100x = 4340

x = 4340/100

x = 43,4

c) 45% de R$ 640,00

100%------------640

45%--------------x

100.x = 640.45

100x = 28800

x = 28800/100

x = 288

d) 95% de R$ 1 200,00

100%-----------1 200

95%------------x

100.x = 1200.95

100x = 114000

x = 114000/100

x = 1140

e) 10% de R$ 35,20

100%-------------35,20

10%---------------x

100.x = 10.35,20

100x = 352

x = 352/100

x = 3,52

Espero ter ajudado.

Bons estudos.

Answer 2

230 100
x 16

100x : 230 x 16
100x : 3680
x : 3680 Letra A
100
x : 36,8

140 100
x 31

100x : 140 x 31
100x : 4340
x : 4340 Letra B
100
x : 43,4

640 100
x 45

100x : 640 x 45
100x : 28800
x : 28800 Letra C
100
x : 288

1200 100
x 95

100x : 1200 x 95
100x: 114000
x : 114000 Letra D
100
x : 1140

3520 100
x 10

100x : 3520 x 10
100x : 35200
x : 35200 Letra E
100
x : 352