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:
74 = 2 × 37
74 is a composite number.
Written with exponents:
500,000,084 = 2 × 2 × 41 × 3,048,781 = 22 × 41 × 3,048,781
500,000,084 is a composite number.
74/500,000,084 =
(74 ÷ 2) / (500,000,084 ÷ 2) =
37/250,000,042
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.
74/500,000,084 =
(2 × 37)/(22 × 41 × 3,048,781) =
((2 × 37) ÷ 2) / ((22 × 41 × 3,048,781) ÷ 2) =
37/(2 × 41 × 3,048,781) =
37/250,000,042
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
37/250,000,042 =
37 ÷ 250,000,042 =
0.000000148 ≈
0