Detailed calculations and explanations, below
A common ordinary fraction is made up of
two integer numbers and a fraction bar:
3,267/ - 11
Write the sign of the number in front of the fraction:
3,267/ - 11 = - 3,267/11
- The integer number above the bar is called numerator: 3,267
- The integer number below the bar is called denominator: 11
- The sign of the fraction: - (a negative value).
- The fraction bar means that the numerator is divided by the denominator.
- To get the fraction's value divide the numerator by the denominator:
The value = - 3,267 ÷ 11
To reduce a fraction to the lowest terms equivalent: divide the numerator and denominator by their greatest common factor, GCF
To calculate the greatest common factor, GCF:
- 1. Factor the numerator and the denominator (into prime factors), build their prime factorizations.
- 2. Multiply all their common prime factors, taken by the lowest exponents.
1. Factor the numerator and the denominator:
To factor a number (into prime factors) - or, in other words, to break it down to prime factors - or, in other words, to build its prime factorization: find the prime numbers that multiply together to get that number.
The prime factorizations:
Written with exponents:
3,267 = 3 × 3 × 3 × 11 × 11 = 33 × 112
3,267 is a composite number.
11 is a prime number, it cannot be factored (into other prime factors).
- 3,267/11 =
- (3,267 ÷ 11) / (11 ÷ 11) =
- 297/1 =
297
* When it's 1, the denominator of the fraction can be omitted.
Yet another method to reduce the fraction
To reduce a fraction without calculating the GCF: factor its numerator and denominator, then all the common prime factors are easily identified and crossed out.
- 3,267/11 =
- (33 × 112)/11 =
- ((33 × 112) ÷ 11) / (11 ÷ 11) =
- (33 × 11)/1 =
- (33 × 11) =
- 297
* When it's 1, the denominator of the fraction can be omitted.