Fracții zecimale periodice simple :8/9=0.(8) , 5/6=0.8(3) , 2/45=0.0(4) 37/15= 2.4(6), 403/600=0.671(6), 25/75=0.(3).
Fracții periodice mixte: 1/13 = 0.0(7692).
Nu au perioada: 3/4= 0.75 , 17/100= 0.17 , 239/17= 14.058, 45/43= 10.46 , 1/62=0.016
9/125 = 0.072 , 701/20= 35.05 , 4/100= 0.04.