amplificam 1 cu 3 .
1/3+2/3 = 3/3
amplificam 1/150 cu 4 iar 1/200 cu 3 + amplficam 1/42 cu 6 si 5/36 cu 7 si 1/63 cu 4
3/3*(4/600-3/600):1/300+14/25*(6/252+35/252+4/252)=
3/3* 1/600 :1/300 + 14/25 *45/252=
1/600 : 1/300 + 9/90 =
1/2 + 9/90 =
amplificam 1/2 cu 45
45/90 +9/90 =54/90 simplificam cu 18 => = 3/5
