2. Write the number as an improper fraction.
- 1.1111111112 can be written as an improper fraction.
- An improper fraction = the numerator is larger than or equal to the denominator..
Write down the number divided by 1, as a fraction:
1.1111111112 = 1.1111111112/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 10,000,000,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
1.1111111112/1 =
(1.1111111112 × 10,000,000,000)/(1 × 10,000,000,000) =
11,111,111,112/10,000,000,000
3. Reduce (simplify) the fraction above:
11,111,111,112/10,000,000,000
to the lowest terms, to its simplest equivalent form, irreducible.
To reduce a fraction to the lowest terms divide the numerator and denominator by their greatest (highest) common factor (divisor), GCF.
Factor the numerator and denominator (prime factorization).
11,111,111,112 = 23 × 3 × 462,962,963
10,000,000,000 = 210 × 510
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (23 × 3 × 462,962,963; 210 × 510) = 23
Divide both the numerator and the denominator by their GCF.
11,111,111,112/10,000,000,000 =
(23 × 3 × 462,962,963)/(210 × 510) =
((23 × 3 × 462,962,963) ÷ 23) / ((210 × 510) ÷ 23) =
(3 × 462,962,963)/(27 × 510) =
1,388,888,889/1,250,000,000
4. The fraction is an improper one, rewrite it as a mixed number (mixed fraction):
- A mixed number = an integer number and a proper fraction, of the same sign.
- Example 1: 2 1/5; Example 2: - 1 3/7.
- A proper fraction = the numerator is smaller than the denominator.
1,388,888,889 ÷ 1,250,000,000 = 1, remainder = 138,888,889 ⇒
1,388,888,889 = 1 × 1,250,000,000 + 138,888,889 ⇒
1,388,888,889/1,250,000,000 =
(1 × 1,250,000,000 + 138,888,889) / 1,250,000,000 =
(1 × 1,250,000,000) / 1,250,000,000 + 138,888,889/1,250,000,000 =
1 + 138,888,889/1,250,000,000 =
1 138,888,889/1,250,000,000