regla de tres simple
Caso1
1 paquete ------- 1/2 Kg
x paquete -------- 1 1/2kg = 3/2Kg
x= (1* 3/2)/(1/2) = (3/2)/(1/2)= 3*2/2*1 = 6/2 =3 paquetes
caso1
1 paquete ---------- 1/8kg
x paquete------------1 1/2Kg=3/2kg
x= (1*3/2)/(1/8) = (3/2)/(1/8)= 3*8/2*1 = 24/2 = 12 paquetes
caso3
1paquete ------------- 1/4kg
x paquete--------------1 1/2kg=3/2kg
x=(1*3/2)/(1/4)=(3/2)/(1/4)=3*4/2*1 = 12/2 = 6 paquetes