0.004 repeating can be expressed as a fraction by using the formula for repeating decimals. Since there are three digits after the decimal point that repeat (004), the fraction can be written as 4/999. This is derived by placing the repeating digits (004) over a denominator of 9 for each digit, resulting in 4/9 for the non-repeating part and 4/999 for the repeating part.
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0004 ------- 1
The fraction for .4 repeating is 2/5.
If all 3 digits are repeating then as a fraction it is 215/999
0004 = 4
It is: 82/99 = 0.828282.....repeating