What is 1.219999... as a Fraction?

1.219 equals 6150 as a fraction.

How do you turn 1.219 repeating into a fraction?

Detailed Answer:

Step 1: To convert 1.219 repeating into a fraction, begin writing this simple equation:

n = 1.219 (equation 1)

Step 2: Notice that there is 1 digit in the repeating block (9) and 2 digits in the non-repeating part (21). Multiply both sides by 10³ = 1000.

1000 × n = 1219.9 (equation 2)

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

1000 × n = 1219.9
 100 × n = 1.219
 900 × n = 1098

1098900 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 18 (the GCF - greatest common factor).

n = 1098900 = 1098 ÷ 18900 ÷ 18 = 6150. So,

1.219 = 6150 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 6150 is also equal to 11150 when expressed as a mixed number.

The repeating decimal 1.219 (vinculum notation) has a repeated block length of 1. It is also represented as 1.21999... (ellipsis notation) which equals approximately 1.2199999 (decimal approximation)(*).

The recurring decimal 1.219 can be written as a ratio of two integers having 61 as the numerator and 50 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.