What is 3.42828... as a Fraction?

3.428 equals 1697495 as a fraction.

How do you turn 3.428 repeating into a fraction?

Detailed Answer:

Step 1: To convert 3.428 repeating into a fraction, begin writing this simple equation:

n = 3.428 (equation 1)

Step 2: Notice that there are 2 digits in the repeating block (28) and 1 digit in the non-repeating part (4). Multiply both sides by 10³ = 1000.

1000 × n = 3428.28 (equation 2)

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

1000 × n = 3428.28
  10 × n = 3.428
 990 × n = 3394

3394990 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 2 (the GCF - greatest common factor).

n = 3394990 = 3394 ÷ 2990 ÷ 2 = 1697495. So,

3.428 = 1697495 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 1697495 is also equal to 3212495 when expressed as a mixed number.

The repeating decimal 3.428 (vinculum notation) has a repeated block length of 2. It is also represented as 3.4282828... (ellipsis notation) which equals approximately 3.42828282828 (decimal approximation)(*).

The recurring decimal 3.428 can be written as a ratio of two integers having 1697 as the numerator and 495 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.