2. Write the number as an improper fraction.
- 704.8 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:
704.8 = 704.8/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 10.
- 1 followed by as many 0-s as the number of digits after the decimal point.
704.8/1 =
(704.8 × 10)/(1 × 10) =
7,048/10
3. Reduce (simplify) the fraction above:
7,048/10
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).
7,048 = 23 × 881
10 = 2 × 5
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (23 × 881; 2 × 5) = 2
Divide both the numerator and the denominator by their GCF.
7,048/10 =
(23 × 881)/(2 × 5) =
((23 × 881) ÷ 2) / ((2 × 5) ÷ 2) =
(22 × 881)/5 =
3,524/5
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.
3,524 ÷ 5 = 704, remainder = 4 ⇒
3,524 = 704 × 5 + 4 ⇒
3,524/5 =
(704 × 5 + 4) / 5 =
(704 × 5) / 5 + 4/5 =
704 + 4/5 =
704 4/5