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:
54 = 2 × 3 × 3 × 3 = 2 × 33
54 is a composite number.
500,000,074 = 2 × 7 × 4,373 × 8,167
500,000,074 is a composite number.
54/500,000,074 =
(54 ÷ 2) / (500,000,074 ÷ 2) =
27/250,000,037
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.
54/500,000,074 =
(2 × 33)/(2 × 7 × 4,373 × 8,167) =
((2 × 33) ÷ 2) / ((2 × 7 × 4,373 × 8,167) ÷ 2) =
33/(7 × 4,373 × 8,167) =
27/250,000,037
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
27/250,000,037 =
27 ÷ 250,000,037 =
0.000000108 ≈
0