2. Write the number as an improper fraction.
- 1.18181818185 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:
1.18181818185 = 1.18181818185/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 100,000,000,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
1.18181818185/1 =
(1.18181818185 × 100,000,000,000)/(1 × 100,000,000,000) =
118,181,818,185/100,000,000,000
3. Reduce (simplify) the fraction above:
118,181,818,185/100,000,000,000
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).
118,181,818,185 = 3 × 5 × 149 × 52,877,771
100,000,000,000 = 211 × 511
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (3 × 5 × 149 × 52,877,771; 211 × 511) = 5
Divide both the numerator and the denominator by their GCF.
118,181,818,185/100,000,000,000 =
(3 × 5 × 149 × 52,877,771)/(211 × 511) =
((3 × 5 × 149 × 52,877,771) ÷ 5) / ((211 × 511) ÷ 5) =
(3 × 149 × 52,877,771)/(211 × 510) =
23,636,363,637/20,000,000,000
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.
23,636,363,637 ÷ 20,000,000,000 = 1, remainder = 3,636,363,637 ⇒
23,636,363,637 = 1 × 20,000,000,000 + 3,636,363,637 ⇒
23,636,363,637/20,000,000,000 =
(1 × 20,000,000,000 + 3,636,363,637) / 20,000,000,000 =
(1 × 20,000,000,000) / 20,000,000,000 + 3,636,363,637/20,000,000,000 =
1 + 3,636,363,637/20,000,000,000 =
1 3,636,363,637/20,000,000,000