Răspuns:
1.a)3/9=1/3
b)12/15=4/5
c)21/42=7/14=1/2
d)24/27=8/9
e)36/24=12/8
f)69/45=23/15
g)123/231=41/77
h)105/216=35/72
2.a)2/6=1/3
b)8/10=4/5
c)16/22=8/11
d)24/28=12/14=6/7
e)32/36=16/18
f)34/30=17/15
g)64/108=32/54
h)102/58=51/29
i)124/142=62/71
j)1008/2016=504/1008