2. Write the number as an improper fraction.
- 4.31042955 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:
4.31042955 = 4.31042955/1
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.
4.31042955/1 =
(4.31042955 × 100,000,000)/(1 × 100,000,000) =
431,042,955/100,000,000
3. Reduce (simplify) the fraction above:
431,042,955/100,000,000
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).
431,042,955 = 3 × 5 × 73 × 199 × 421
100,000,000 = 28 × 58
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (3 × 5 × 73 × 199 × 421; 28 × 58) = 5
Divide both the numerator and the denominator by their GCF.
431,042,955/100,000,000 =
(3 × 5 × 73 × 199 × 421)/(28 × 58) =
((3 × 5 × 73 × 199 × 421) ÷ 5) / ((28 × 58) ÷ 5) =
(3 × 73 × 199 × 421)/(28 × 57) =
86,208,591/20,000,000
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.
86,208,591 ÷ 20,000,000 = 4, remainder = 6,208,591 ⇒
86,208,591 = 4 × 20,000,000 + 6,208,591 ⇒
86,208,591/20,000,000 =
(4 × 20,000,000 + 6,208,591) / 20,000,000 =
(4 × 20,000,000) / 20,000,000 + 6,208,591/20,000,000 =
4 + 6,208,591/20,000,000 =
4 6,208,591/20,000,000