2. Write the number as an improper fraction.
- 21.334 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:
21.334 = 21.334/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 1,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
21.334/1 =
(21.334 × 1,000)/(1 × 1,000) =
21,334/1,000
3. Reduce (simplify) the fraction above:
21,334/1,000
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).
21,334 = 2 × 10,667
1,000 = 23 × 53
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (2 × 10,667; 23 × 53) = 2
Divide both the numerator and the denominator by their GCF.
21,334/1,000 =
(2 × 10,667)/(23 × 53) =
((2 × 10,667) ÷ 2) / ((23 × 53) ÷ 2) =
10,667/(22 × 53) =
10,667/500
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.
10,667 ÷ 500 = 21, remainder = 167 ⇒
10,667 = 21 × 500 + 167 ⇒
10,667/500 =
(21 × 500 + 167) / 500 =
(21 × 500) / 500 + 167/500 =
21 + 167/500 =
21 167/500