Question

Porcentagem calcule a.20% de 345 b.35% de 122 c.50% de456 d 20% de 800 e 19% de 135 f 15% de 140 g 79% de 490

Answer 1

Oi...

Calcule:

a) 20% de 345

100x = 20.345

100x = 6900

x = 6900/100

x = 69

b) 35% de 122

100x = 35. 122

100x = 4270

x = 4270/100

x = 42,7

c) 50% de 456

100x = 50.456

100x = 22800

x = 22800/100

x = 228

d) 20% de 800

100x = 20.800

100x = 16000

x = 16000/100

x = 160

e) 19% de 135

100x = 19.135

100x = 2565

x = 2565/100

x = 25,65

f) 15% de 140

100x = 15.140

100x = 2100

x = 2100/100

x = 21

g) 79% de 490

100x = 79.490

100x = 38710

x= 38710/100

x = 387,1

Espero ter ajudado