2. Write the number as an improper fraction.
- 75.28 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:
75.28 = 75.28/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 100.
- 1 followed by as many 0-s as the number of digits after the decimal point.
75.28/1 =
(75.28 × 100)/(1 × 100) =
7,528/100
3. Reduce (simplify) the fraction above:
7,528/100
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).
7,528 = 23 × 941
100 = 22 × 52
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (23 × 941; 22 × 52) = 22
Divide both the numerator and the denominator by their GCF.
7,528/100 =
(23 × 941)/(22 × 52) =
((23 × 941) ÷ 22) / ((22 × 52) ÷ 22) =
(2 × 941)/52 =
1,882/25
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.
1,882 ÷ 25 = 75, remainder = 7 ⇒
1,882 = 75 × 25 + 7 ⇒
1,882/25 =
(75 × 25 + 7) / 25 =
(75 × 25) / 25 + 7/25 =
75 + 7/25 =
75 7/25