Răspuns :
D:I=C
5/8 :I=25/36
I=5/8 :25/36
I=5/8 x 36/25
I=9/10
verificare 5/8 : 9/10= 5/8 x 10/9=50/72=25/36
5/8 :I=25/36
I=5/8 :25/36
I=5/8 x 36/25
I=9/10
verificare 5/8 : 9/10= 5/8 x 10/9=50/72=25/36