(1.2:36+1.2:0.25 - 1 5/16) : 169/24 =
= (12/36 +120/25 - 1 5/16) : 169/24 =
= (1/3+4 4/5 - 1 5/16) * 24/169 =
= (5/15 + 4 12/15 - 1 5/16)* 24/169 =
= (5 2/15 - 1 5/16) * 24/169 =
= (5 12/90 - 1 25/90) * 24/169 =
= 3 77/90 * 24/169 =
= 347/90*24/169 =
=1388/2535