(2 3/4+0,15-1 8/25): (2 1/2-1 1/3+0,04)

( 2 3/4 + 0,15 - 1 8/25) / (2 1/2 - 1 1/3 + 0,04) =
(11/4 + 15/100 - 33/25) / (5/2 - 4/3 + 1/25) =
(275/100 + 15/100 - 132/100) / (375/150 - 200/150 + 6/150) =
158 / 100  / 181/150 = 474/ 362 = 1 112/362 = 1 56/181