2. Write the number as an improper fraction.
- 2.80735492 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:
2.80735492 = 2.80735492/1
Turn the top number into a whole number.
- Multiply both the top and the bottom by the same number.
- This number is: 100,000,000.
- 1 followed by as many 0-s as the number of digits after the decimal point.
2.80735492/1 =
(2.80735492 × 100,000,000)/(1 × 100,000,000) =
280,735,492/100,000,000
3. Reduce (simplify) the fraction above:
280,735,492/100,000,000
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).
280,735,492 = 22 × 257 × 347 × 787
100,000,000 = 28 × 58
Calculate the greatest (highest) common factor (divisor), GCF.
Multiply all the common prime factors by the lowest exponents.
GCF (22 × 257 × 347 × 787; 28 × 58) = 22
Divide both the numerator and the denominator by their GCF.
280,735,492/100,000,000 =
(22 × 257 × 347 × 787)/(28 × 58) =
((22 × 257 × 347 × 787) ÷ 22) / ((28 × 58) ÷ 22) =
(257 × 347 × 787)/(26 × 58) =
70,183,873/25,000,000
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.
70,183,873 ÷ 25,000,000 = 2, remainder = 20,183,873 ⇒
70,183,873 = 2 × 25,000,000 + 20,183,873 ⇒
70,183,873/25,000,000 =
(2 × 25,000,000 + 20,183,873) / 25,000,000 =
(2 × 25,000,000) / 25,000,000 + 20,183,873/25,000,000 =
2 + 20,183,873/25,000,000 =
2 20,183,873/25,000,000