13/30
7/15=14/30
3/10=9/30
2/5=12/30
7/15;13/30;2/5;3/10
------------------------------------
9/16+2 2 9/16 41/16
= ---------- = ---------------- = ---------- = 41/16*16/7=41/7= 5 6/7
1-9/16 16/16-9/16 7/16
-----------------------------------------
2,48+32/9*9/8 2,48+4 6,48
= ------------------- = ----------- = -------- = 2,7
2,4 2,4 2,4