Question

Write the number 0.21212121… as a fraction.
Let x=.
100 x=
100 x −x= -

99 x=

x =


So 0.2121… is equal to=

Answer 1

Answer:

x=0.212121... (1)

100x=21.2121... (2)

on subtracting (1) from (2)

99x=21

x=21/99

x=7/33