2. Write the number as an improper fraction.
- 4.1818185 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:
4.1818185 = 4.1818185/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 10,000,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
4.1818185/1 =
(4.1818185 × 10,000,000)/(1 × 10,000,000) =
41,818,185/10,000,000
3. Reduce (simplify) the fraction above:
41,818,185/10,000,000
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).
41,818,185 = 32 × 5 × 929,293
10,000,000 = 27 × 57
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (32 × 5 × 929,293; 27 × 57) = 5
Divide both the numerator and the denominator by their GCF.
41,818,185/10,000,000 =
(32 × 5 × 929,293)/(27 × 57) =
((32 × 5 × 929,293) ÷ 5) / ((27 × 57) ÷ 5) =
(32 × 929,293)/(27 × 56) =
8,363,637/2,000,000
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.
8,363,637 ÷ 2,000,000 = 4, remainder = 363,637 ⇒
8,363,637 = 4 × 2,000,000 + 363,637 ⇒
8,363,637/2,000,000 =
(4 × 2,000,000 + 363,637) / 2,000,000 =
(4 × 2,000,000) / 2,000,000 + 363,637/2,000,000 =
4 + 363,637/2,000,000 =
4 363,637/2,000,000