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Answer:
There is a nifty short cut method to change recurring decimals into fractions:
If all the digits recur
Write a fraction as :
the recurring digit(s)
9
for each recurring digit
Then simplify if possible to get simplest form.
0.55555
...
.
.
=
0
.
¯
5
=
5
9
0.272727
...
=
0
.
¯¯¯¯
27
=
27
99
=
3
11
0
.
¯¯¯¯
32
=
32
99
3
.
¯¯¯¯¯¯
732
=
3
732
999
=
3
244
333
If only some digits recur
Write a fraction as:
all the digits - non-recurring digits
9
for each recurring
and
0
for each non-recurring digit
0.654444
...
=
0.65
¯
4
=
654
−
65
900
=
589
900
0.85
¯¯¯¯¯¯
271
=
85271
−
85
99900
=
85186
99900
=
42593
49950
4.167
¯
4
=
4
1673
−
167
9000
=
4
1506
9000
=
4
251
1500
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