What is 18.2252525... as a Fraction?

18.225 equals 18043990 as a fraction.

How do you turn 18.225 repeating into a fraction?

Detailed Answer:

Step 1: To convert 18.225 repeating into a fraction, begin writing this simple equation:

n = 18.225 (equation 1)

Step 2: Notice that there are 2 digits in the repeating block (25) and 1 digit in the non-repeating part (2). Multiply both sides by 10³ = 1000.

1000 × n = 18225.25 (equation 2)

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

1000 × n = 18225.25
  10 × n = 18.225
 990 × n = 18043

n = 18043990 (answer)

18.225 = 18043990 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 18043990 is also equal to 18223990 when expressed as a mixed number.

The repeating decimal 18.225 (vinculum notation) has a repeated block length of 2. It is also represented as 18.2252525... (ellipsis notation) which equals approximately 18.22525252525 (decimal approximation)(*).

The recurring decimal 18.225 can be written as a ratio of two integers having 18043 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.