Question

Calcule as porcentagens: a)58% de 300 b)43% de 298 c)79% de 720 d)80% de 1540

Answer 1

———Aplicação de Regra de 3 ————

A) 174

300—-100%
X——-58%

300•58=100•X
17.400=100X
X=17.40/100
X= 174

B)128,14

298—-100%
X——-43%

298•43=100•X
12.814=100X
X=12.814/100
X= 128,14

C)568,80

720—100%
X———79%

720•79=100•X
56.880=100X
X=56.880/100
X=568,80

D)1.232

1540—-100%
X———80X%

1540•80=100•X
123.200=100X
X=123.200/100
X=1.232