Răspuns:
{x y z} i.p. {0,(3) , 0,25 , 0,2}
2x+2z/5y+z
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0,(3) = 1/3
0,25= 1/4
0,2 = 1/5
1/3 × 1/4 × 1/5 = K
x=1/3 =>K = 3k
y=1/4 =>K= 4K
z=1/5=>K= 5k
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2x+2z / 5y+z = K
2 × 3K +2×4K / 5× 4K + 5K =14/25
14/25 nu se mai poate simplfica.