2. Write the number as an improper fraction.
- 4.3571428578 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:
4.3571428578 = 4.3571428578/1
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.
4.3571428578/1 =
(4.3571428578 × 10,000,000,000)/(1 × 10,000,000,000) =
43,571,428,578/10,000,000,000
3. Reduce (simplify) the fraction above:
43,571,428,578/10,000,000,000
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).
43,571,428,578 = 2 × 33 × 53 × 15,224,119
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 (2 × 33 × 53 × 15,224,119; 210 × 510) = 2
Divide both the numerator and the denominator by their GCF.
43,571,428,578/10,000,000,000 =
(2 × 33 × 53 × 15,224,119)/(210 × 510) =
((2 × 33 × 53 × 15,224,119) ÷ 2) / ((210 × 510) ÷ 2) =
(33 × 53 × 15,224,119)/(29 × 510) =
21,785,714,289/5,000,000,000
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.
21,785,714,289 ÷ 5,000,000,000 = 4, remainder = 1,785,714,289 ⇒
21,785,714,289 = 4 × 5,000,000,000 + 1,785,714,289 ⇒
21,785,714,289/5,000,000,000 =
(4 × 5,000,000,000 + 1,785,714,289) / 5,000,000,000 =
(4 × 5,000,000,000) / 5,000,000,000 + 1,785,714,289/5,000,000,000 =
4 + 1,785,714,289/5,000,000,000 =
4 1,785,714,289/5,000,000,000