What is 1.98571485714857148571485714... as a Fraction?

1.985714 equals 397139199998 as a fraction.

How do you turn 1.985714 repeating into a fraction?

Detailed Answer:

Step 1: To convert 1.985714 repeating into a fraction, begin writing this simple equation:

n = 1.985714 (equation 1)

Step 2: Notice that there are 5 digits in the repeating block (85714) and 1 digit in the non-repeating part (9). Multiply both sides by 10⁶ = 1000000.

1000000 × n = 1985714.85714 (equation 2)

Step 3: Now subtract equation 1 from equation 2 to cancel the repeating block (or repetend) out.

1000000 × n = 1985714.85714
     10 × n = 1.985714
 999990 × n = 1985695

1985695999990 could be the answer, but it still can be put in the simplest form, i.e., reduced.

To simplify this fraction, divide the numerator and denominator by 5 (the GCF - greatest common factor).

n = 1985695999990 = 1985695 ÷ 5999990 ÷ 5 = 397139199998. So,

1.985714 = 397139199998 as the lowest possible fraction.

As the numerator is greater than the denominator, we have an improper fraction, so we can also express it as a mixed number, thus 397139199998 is also equal to 1197141199998 when expressed as a mixed number.

The repeating decimal 1.985714 (vinculum notation) has a repeated block length of 5. It is also represented as 1.9857148571485714... (ellipsis notation) which equals approximately 1.98571485714857148571485714 (decimal approximation)(*).

The recurring decimal 1.985714 can be written as a ratio of two integers having 397139 as the numerator and 199998 as the denominator. So, it is a rational number (named after ratio). It can be shown that a number is rational if its decimal representation is repeating or terminating.

(*) At present, there is no single universally accepted notation or phrasing for repeating decimals.