2. Write the number as an improper fraction.
- 47.57142857142 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:
47.57142857142 = 47.57142857142/1
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.
47.57142857142/1 =
(47.57142857142 × 100,000,000,000)/(1 × 100,000,000,000) =
4,757,142,857,142/100,000,000,000
3. Reduce (simplify) the fraction above:
4,757,142,857,142/100,000,000,000
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).
4,757,142,857,142 = 2 × 3 × 13 × 155,699 × 391,711
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 (2 × 3 × 13 × 155,699 × 391,711; 211 × 511) = 2
Divide both the numerator and the denominator by their GCF.
4,757,142,857,142/100,000,000,000 =
(2 × 3 × 13 × 155,699 × 391,711)/(211 × 511) =
((2 × 3 × 13 × 155,699 × 391,711) ÷ 2) / ((211 × 511) ÷ 2) =
(3 × 13 × 155,699 × 391,711)/(210 × 511) =
2,378,571,428,571/50,000,000,000
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.
2,378,571,428,571 ÷ 50,000,000,000 = 47, remainder = 28,571,428,571 ⇒
2,378,571,428,571 = 47 × 50,000,000,000 + 28,571,428,571 ⇒
2,378,571,428,571/50,000,000,000 =
(47 × 50,000,000,000 + 28,571,428,571) / 50,000,000,000 =
(47 × 50,000,000,000) / 50,000,000,000 + 28,571,428,571/50,000,000,000 =
47 + 28,571,428,571/50,000,000,000 =
47 28,571,428,571/50,000,000,000