ms1 = 300g, c1% = 20%
md2 = 35 g
m.apa = 150g
stim ca c% = mdx100/ms
si ca ms = ms1 + md + m.apa
=> md1 = ms1xc1/100 = 300x20/100 = 60 g
=> ms.final = 60+35+150 = 245 g
md.final = md1+md2 = 60+35 = 95 g
=> c%final = md.finalx100/ms.final
= 95x100/245 = 38,77%
