Odpowiedzi

2010-02-28T22:25:35+01:00
(8 4/5:3 1/7+ 6 3/5 :1 1/2) : (1 1/6 : 1 1/4) =
= [(44/5) * (7/22) + (33/5) * (2/3)] : [(7/6) * (4/5)] =
= [(308/110) + (66/15)] : (28/30) =
= [ 2⅘ + 4⅖] * (30/28) =
= 7⅕ * (30/28) =
= (36/5) * (30/28) =
= 1080/140 =
=108/14
= 7 i (5/7)

10,5% = 0,105 = (105/1000) = (21/200)
(21/200) * (108/14) = (2268/2800) = 0,81