Explicație:
0,3=3/10
0,31=31/100
0,6=6/10
12,5=125/10
2,512=2512/1000
0,(4)=4/9
0,(47)=47/99
1,(6)=16-1/9=15/9
12,(5)=125-5/9=120/9
2,(512)=2512-2/999=2510/999
0,8(5)=85-8/9=77/9
0,7(31)=731-7/99=724/99
1,2(6)=126-12/9=114/9
2,4(512)=24512-24/999=24488/999
12,0(2)=1202-120/9=1082/9
