Question

a-Quanto é:
a) 50% de 300 b) 20% de 60
c) 25% de 100 d) 80% de 200​

Answer 1

Resposta:

a) 50% de 300

50% = 1/2

1/2 = x/300

2.x = 300.1

2x = 300

x = 300/2

x = 150

b) 20% de 60

20% = 1/5

1/5 = x/60

5.x = 60.1

5x = 60

x = 60/5

x = 12

c) 25% de 100

25% = 1/4

1/4 = x/100

4.x = 100.1

4x = 100

x = 100/4

x = 25

d) 80% de 200

80% = 4/5

4/5 = x/200

5.x = 200.4

5x = 800

x = 800/5

x = 160