2. Write the number as an improper fraction.
- 7.11111114 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:
7.11111114 = 7.11111114/1
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.
- 1 followed by as many 0-s as the number of digits after the decimal point.
7.11111114/1 =
(7.11111114 × 100,000,000)/(1 × 100,000,000) =
711,111,114/100,000,000
3. Reduce (simplify) the fraction above:
711,111,114/100,000,000
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).
711,111,114 = 2 × 32 × 7 × 337 × 16,747
100,000,000 = 28 × 58
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (2 × 32 × 7 × 337 × 16,747; 28 × 58) = 2
Divide both the numerator and the denominator by their GCF.
711,111,114/100,000,000 =
(2 × 32 × 7 × 337 × 16,747)/(28 × 58) =
((2 × 32 × 7 × 337 × 16,747) ÷ 2) / ((28 × 58) ÷ 2) =
(32 × 7 × 337 × 16,747)/(27 × 58) =
355,555,557/50,000,000
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.
355,555,557 ÷ 50,000,000 = 7, remainder = 5,555,557 ⇒
355,555,557 = 7 × 50,000,000 + 5,555,557 ⇒
355,555,557/50,000,000 =
(7 × 50,000,000 + 5,555,557) / 50,000,000 =
(7 × 50,000,000) / 50,000,000 + 5,555,557/50,000,000 =
7 + 5,555,557/50,000,000 =
7 5,555,557/50,000,000