2. Write the number as an improper fraction.
- 800.5005 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:
800.5005 = 800.5005/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 10,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
800.5005/1 =
(800.5005 × 10,000)/(1 × 10,000) =
8,005,005/10,000
3. Reduce (simplify) the fraction above:
8,005,005/10,000
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).
8,005,005 = 32 × 5 × 177,889
10,000 = 24 × 54
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (32 × 5 × 177,889; 24 × 54) = 5
Divide both the numerator and the denominator by their GCF.
8,005,005/10,000 =
(32 × 5 × 177,889)/(24 × 54) =
((32 × 5 × 177,889) ÷ 5) / ((24 × 54) ÷ 5) =
(32 × 177,889)/(24 × 53) =
1,601,001/2,000
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.
1,601,001 ÷ 2,000 = 800, remainder = 1,001 ⇒
1,601,001 = 800 × 2,000 + 1,001 ⇒
1,601,001/2,000 =
(800 × 2,000 + 1,001) / 2,000 =
(800 × 2,000) / 2,000 + 1,001/2,000 =
800 + 1,001/2,000 =
800 1,001/2,000