Question

Calcule as porcentagens a seguir.
a. 12% de 3 600.
b. 25% de 424.
c. 5% de 560.
d. 1% de 133

Answer 1

Para calcular as porcentagens vamos multiplicar cruzado:

a) 3.600 ------------- 100%

      x  ----------------    12%

100x = 43.200

x = 43200/100

x = 432/1

x = 432

b) 424 ------------ 100%

      x  ------------    25%

100x = 10600

x = 10600/100

x = 106

c) 560 ------------ 100%

     x  --------------  5%

100x = 2800

x = 2800/100

x = 28

d) 133 ---------- 100%

     x  -------------- 1%

100x = 133

x = 133/100

x = 1,33