2. Write the number as an improper fraction.
- 1.2529 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:
1.2529 = 1.2529/1
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.
1.2529/1 =
(1.2529 × 10,000)/(1 × 10,000) =
12,529/10,000
3. Reduce (simplify) the fraction above:
12,529/10,000
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).
12,529 = 11 × 17 × 67
10,000 = 24 × 54
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
But, the numerator and the denominator have no common factors.
GCF (11 × 17 × 67; 24 × 54) = 1
The numerator and the denominator are coprime numbers (no common prime factors, GCF = 1). So, the fraction cannot be reduced (simplified): irreducible fraction.
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.
12,529 ÷ 10,000 = 1, remainder = 2,529 ⇒
12,529 = 1 × 10,000 + 2,529 ⇒
12,529/10,000 =
(1 × 10,000 + 2,529) / 10,000 =
(1 × 10,000) / 10,000 + 2,529/10,000 =
1 + 2,529/10,000 =
1 2,529/10,000