Question

Rezolvați subiectul asta și dau coroana :

Answer 1

x salariul mamei
y salariul tatalui
20%x=40%y
x/y=40%/20%=2

3,2/8=0,4
1,0(6)=(106-10)/90=96/90=16/15
2,(6)=26-2/9=24/9=8/3
(16/15) / (8/3)= 16x3/15x8=2/5=0,4
deci
3,2/8=1,0(6)/2,(6)

2,52/1,19 = 7x0,36/7x0,17 = 0,36/0,17
deci 
0,36/0,17=2,52/1,19


134/152 =67/76
1,625/1,8(3) = (13/8) / (11/6)=13/8x6/11=78/88 =39/44
1,625=1625/1000=65/40=13/8
1,8(3)=(183-18)/90=165/90=11/6
deci 67/76 ≠ 39/44