2. Write the number as an improper fraction.
- 1.66668 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:
1.66668 = 1.66668/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 100,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
1.66668/1 =
(1.66668 × 100,000)/(1 × 100,000) =
166,668/100,000
3. Reduce (simplify) the fraction above:
166,668/100,000
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).
166,668 = 22 × 3 × 17 × 19 × 43
100,000 = 25 × 55
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (22 × 3 × 17 × 19 × 43; 25 × 55) = 22
Divide both the numerator and the denominator by their GCF.
166,668/100,000 =
(22 × 3 × 17 × 19 × 43)/(25 × 55) =
((22 × 3 × 17 × 19 × 43) ÷ 22) / ((25 × 55) ÷ 22) =
(3 × 17 × 19 × 43)/(23 × 55) =
41,667/25,000
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.
41,667 ÷ 25,000 = 1, remainder = 16,667 ⇒
41,667 = 1 × 25,000 + 16,667 ⇒
41,667/25,000 =
(1 × 25,000 + 16,667) / 25,000 =
(1 × 25,000) / 25,000 + 16,667/25,000 =
1 + 16,667/25,000 =
1 16,667/25,000