What is 1.247171... as a Fraction?

1.2471 equals 123479900 as a fraction.

How do you turn 1.2471 repeating into a fraction?

Detailed Answer:

Step 1: To convert 1.2471 repeating into a fraction, begin writing this simple equation:

n = 1.2471 (equation 1)

Step 2: Notice that there are 2 digits in the repeating block (71) and 2 digits in the non-repeating part (24). Multiply both sides by 10⁴ = 10000.

10000 × n = 12471.71 (equation 2)

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

10000 × n = 12471.71
  100 × n = 1.2471
 9900 × n = 12347

n = 123479900 (answer)

1.2471 = 123479900 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 123479900 is also equal to 124479900 when expressed as a mixed number.

The repeating decimal 1.2471 (vinculum notation) has a repeated block length of 2. It is also represented as 1.24717171... (ellipsis notation) which equals approximately 1.247171717171 (decimal approximation)(*).

The recurring decimal 1.2471 can be written as a ratio of two integers having 12347 as the numerator and 9900 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.