What is 172.11777... as a Fraction?

172.117 equals 77453450 as a fraction.

How do you turn 172.117 repeating into a fraction?

Detailed Answer:

Step 1: To convert 172.117 repeating into a fraction, begin writing this simple equation:

n = 172.117 (equation 1)

Step 2: Notice that there is 1 digit in the repeating block (7) and 2 digits in the non-repeating part (11). Multiply both sides by 10³ = 1000.

1000 × n = 172117.7 (equation 2)

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

1000 × n = 172117.7
 100 × n = 172.117
 900 × n = 154906

154906900 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 = 154906900 = 154906 ÷ 2900 ÷ 2 = 77453450. So,

172.117 = 77453450 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 77453450 is also equal to 17253450 when expressed as a mixed number.

The repeating decimal 172.117 (vinculum notation) has a repeated block length of 1. It is also represented as 172.11777... (ellipsis notation) which equals approximately 172.1177777 (decimal approximation)(*).

The recurring decimal 172.117 can be written as a ratio of two integers having 77453 as the numerator and 450 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.