What is 66.1666... as a Fraction?

66.16 equals 3976 as a fraction.

How do you turn 66.16 repeating into a fraction?

Detailed Answer:

Step 1: To convert 66.16 repeating into a fraction, begin writing this simple equation:

n = 66.16 (equation 1)

Step 2: Notice that there is 1 digit in the repeating block (6) and 1 digit in the non-repeating part (1). Multiply both sides by 10² = 100.

100 × n = 6616.6 (equation 2)

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

100 × n = 6616.6
 10 × n = 66.16
 90 × n = 5955

595590 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 15 (the GCF - greatest common factor).

n = 595590 = 5955 ÷ 1590 ÷ 15 = 3976. So,

66.16 = 3976 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 3976 is also equal to 6616 when expressed as a mixed number.

The repeating decimal 66.16 (vinculum notation) has a repeated block length of 1. It is also represented as 66.1666... (ellipsis notation) which equals approximately 66.166666 (decimal approximation)(*).

The recurring decimal 66.16 can be written as a ratio of two integers having 397 as the numerator and 6 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.