1)
100g-4g
60g - x
x=60g*4g/100g
x=2,4g
ms=2,4g
mr=60g+20g = 80g
Cp = ms/mr *100%
Cp = 2,4g/80g *100%
Cp = 240/80%
Cp = 3%
2)
100g - 20g
80g - x
x = 80g*20g/100g
x = 16g
ms=16g + 20g = 36g
mr = 80g + 20g = 100g
Cp = ms/mr *100%
Cp = 36g/100g *100%
Cp = 36%