Конечные дроби:
1/80 = 1/(2*2*2*2*5) = 0,0125,
9/45 = 9/(5*9) = 1/5 = 0,2,
3/20 = 3/(2*2*5) = 0,15,
7/28 = 7/(2*2*7) = 1/4 = 0,25,
7/35 = 7/(5*7) = 1/5 = 0,2,
бесконечные дроби:
4/24 = 4/(2*2*2*3) = 1/6 = 0,16666..... = 0,1(6),
5/60 = 5/(2*2*3*5) = 1/12 = 0,0833.... = 0,08(3),
4/60 = 4/(2*2*3*5) = 1/15 = 0,0666.... = 0,0(6)