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:
60 = 2 × 2 × 3 × 5 = 22 × 3 × 5
60 is a composite number.
500,000,065 = 5 × 827 × 120,919
500,000,065 is a composite number.
60/500,000,065 =
(60 ÷ 5) / (500,000,065 ÷ 5) =
12/100,000,013
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.
60/500,000,065 =
(22 × 3 × 5)/(5 × 827 × 120,919) =
((22 × 3 × 5) ÷ 5) / ((5 × 827 × 120,919) ÷ 5) =
(22 × 3)/(827 × 120,919) =
12/100,000,013
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
12/100,000,013 =
12 ÷ 100,000,013 =
0.00000012 ≈
0