2. Write the number as an improper fraction.
- 1.1111111117 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:
1.1111111117 = 1.1111111117/1
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.
1.1111111117/1 =
(1.1111111117 × 10,000,000,000)/(1 × 10,000,000,000) =
11,111,111,117/10,000,000,000
3. Reduce (simplify) the fraction above:
11,111,111,117/10,000,000,000
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).
11,111,111,117 = 1,021 × 10,882,577
10,000,000,000 = 210 × 510
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
But, the numerator and the denominator have no common factors.
GCF (1,021 × 10,882,577; 210 × 510) = 1
The numerator and the denominator are coprime numbers (no common prime factors, GCF = 1). So, the fraction cannot be reduced (simplified): irreducible fraction.
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.
11,111,111,117 ÷ 10,000,000,000 = 1, remainder = 1,111,111,117 ⇒
11,111,111,117 = 1 × 10,000,000,000 + 1,111,111,117 ⇒
11,111,111,117/10,000,000,000 =
(1 × 10,000,000,000 + 1,111,111,117) / 10,000,000,000 =
(1 × 10,000,000,000) / 10,000,000,000 + 1,111,111,117/10,000,000,000 =
1 + 1,111,111,117/10,000,000,000 =
1 1,111,111,117/10,000,000,000