2. Write the number as an improper fraction.
- 200.2 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:
200.2 = 200.2/1
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.
200.2/1 =
(200.2 × 10)/(1 × 10) =
2,002/10
3. Reduce (simplify) the fraction above:
2,002/10
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).
2,002 = 2 × 7 × 11 × 13
10 = 2 × 5
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (2 × 7 × 11 × 13; 2 × 5) = 2
Divide both the numerator and the denominator by their GCF.
2,002/10 =
(2 × 7 × 11 × 13)/(2 × 5) =
((2 × 7 × 11 × 13) ÷ 2) / ((2 × 5) ÷ 2) =
(7 × 11 × 13)/5 =
1,001/5
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.
1,001 ÷ 5 = 200, remainder = 1 ⇒
1,001 = 200 × 5 + 1 ⇒
1,001/5 =
(200 × 5 + 1) / 5 =
(200 × 5) / 5 + 1/5 =
200 + 1/5 =
200 1/5