bilangan desimal 0,21112111211...dapat dinyatakan dalam bentuk pecahan sederhana m/n nilai n- 3m = ....

Misalkan:

           x =       0,211121112111...
10.000x = 2.111,211121112111...
___________________________-
-9.999x = -2.111
x = 2.111 ÷ 9.999
x = [tex] \frac{2.111}{9.999} [/tex]
[tex] \frac{m}{n}=\frac{2.111}{9.999} [/tex]

m = 2.111
n = 9.999

n - 3m
= 9.999 - 3(2.111)
= 9.999 - 6.333
= 3.666