2. Write the number as an improper fraction.
- 1.8285 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:
1.8285 = 1.8285/1
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.
1.8285/1 =
(1.8285 × 10,000)/(1 × 10,000) =
18,285/10,000
3. Reduce (simplify) the fraction above:
18,285/10,000
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).
18,285 = 3 × 5 × 23 × 53
10,000 = 24 × 54
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (3 × 5 × 23 × 53; 24 × 54) = 5
Divide both the numerator and the denominator by their GCF.
18,285/10,000 =
(3 × 5 × 23 × 53)/(24 × 54) =
((3 × 5 × 23 × 53) ÷ 5) / ((24 × 54) ÷ 5) =
(3 × 23 × 53)/(24 × 53) =
3,657/2,000
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.
3,657 ÷ 2,000 = 1, remainder = 1,657 ⇒
3,657 = 1 × 2,000 + 1,657 ⇒
3,657/2,000 =
(1 × 2,000 + 1,657) / 2,000 =
(1 × 2,000) / 2,000 + 1,657/2,000 =
1 + 1,657/2,000 =
1 1,657/2,000