What is 0.1020202... as a Fraction?

0.1020202 equals 101990 as a fraction.

How do you turn 0.1020202 repeating into a fraction?

Detailed Answer:

Step 1: To convert 0.1020202 repeating into a fraction, begin writing this simple equation:

n = 0.1020202 (equation 1)

Step 2: Notice that there are 6 digits in the repeating block (020202) and 1 digit in the non-repeating part (1). Multiply both sides by 10⁷ = 10000000.

10000000 × n = 1020202.020202 (equation 2)

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

10000000 × n = 1020202.020202
      10 × n = 0.1020202
 9999990 × n = 1020201

10202019999990 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 10101 (the GCF - greatest common factor).

n = 10202019999990 = 1020201 ÷ 101019999990 ÷ 10101 = 101990. So,

0.1020202 = 101990 as the lowest possible fraction.

The repeating decimal 0.1020202 (vinculum notation) has a repeated block length of 6. It is also represented as 0.1020202020202020202... (ellipsis notation) which equals approximately 0.1020202020202020202020202020202 (decimal approximation)(*).

The recurring decimal 0.1020202 can be written as a ratio of two integers having 101 as the numerator and 990 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.