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:
30 = 2 × 3 × 5
30 is a composite number.
Written with exponents:
500,000,028 = 2 × 2 × 3 × 11 × 1,123 × 3,373 = 22 × 3 × 11 × 1,123 × 3,373
500,000,028 is a composite number.
30/500,000,028 =
(30 ÷ 6) / (500,000,028 ÷ 6) =
5/83,333,338
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.
30/500,000,028 =
(2 × 3 × 5)/(22 × 3 × 11 × 1,123 × 3,373) =
((2 × 3 × 5) ÷ (2 × 3)) / ((22 × 3 × 11 × 1,123 × 3,373) ÷ (2 × 3)) =
5/(2 × 11 × 1,123 × 3,373) =
5/83,333,338
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
5/83,333,338 =
5 ÷ 83,333,338 =
0.00000006 ≈
0