Odpowiedź:
A 2/3 i 3/8=16/24 i 9/24
B 5/12 i 3/4=5/12 i 9/12
C 7/6 i 5/9=21/18 i 10/18
D 2/5 2/3 i 1/2= 12/30 20/30 i 15/30
e 4/15 i 7/20= 16/60 i 21/60
f 11/18 i 5/12=22/36 i 15/36
