2. Write the number as an improper fraction.
- 1.2727272728 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:
1.2727272728 = 1.2727272728/1
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.
1.2727272728/1 =
(1.2727272728 × 10,000,000,000)/(1 × 10,000,000,000) =
12,727,272,728/10,000,000,000
3. Reduce (simplify) the fraction above:
12,727,272,728/10,000,000,000
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).
12,727,272,728 = 23 × 37 × 2,297 × 18,719
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 × 37 × 2,297 × 18,719; 210 × 510) = 23
Divide both the numerator and the denominator by their GCF.
12,727,272,728/10,000,000,000 =
(23 × 37 × 2,297 × 18,719)/(210 × 510) =
((23 × 37 × 2,297 × 18,719) ÷ 23) / ((210 × 510) ÷ 23) =
(37 × 2,297 × 18,719)/(27 × 510) =
1,590,909,091/1,250,000,000
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.
1,590,909,091 ÷ 1,250,000,000 = 1, remainder = 340,909,091 ⇒
1,590,909,091 = 1 × 1,250,000,000 + 340,909,091 ⇒
1,590,909,091/1,250,000,000 =
(1 × 1,250,000,000 + 340,909,091) / 1,250,000,000 =
(1 × 1,250,000,000) / 1,250,000,000 + 340,909,091/1,250,000,000 =
1 + 340,909,091/1,250,000,000 =
1 340,909,091/1,250,000,000