Question

Regina vende 600g de cocada a R$4,50 casa uma.Quanto ela vai apurar se vender:
a)100g
b)1,2kg

Answer 1

a)
600g --- R$4,50
100g --- R$  X

600.X = 100 . 4,5
600.X = 450
X = 450/600
X = R$0,75

Cada 100g custa R$0,75.

b)0,6kg --- R$4,5
   1,2kg --- R$ X
X= (1,2*4,5)/0,6
X= R$9,00