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:
2,057,632 = 2 × 2 × 2 × 2 × 2 × 64,301 = 25 × 64,301
2,057,632 is a composite number.
Written with exponents:
499,999,964 = 2 × 2 × 124,999,991 = 22 × 124,999,991
499,999,964 is a composite number.
2,057,632/499,999,964 =
(2,057,632 ÷ 4) / (499,999,964 ÷ 4) =
514,408/124,999,991
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.
2,057,632/499,999,964 =
(25 × 64,301)/(22 × 124,999,991) =
((25 × 64,301) ÷ 22) / ((22 × 124,999,991) ÷ 22) =
(23 × 64,301)/124,999,991 =
514,408/124,999,991
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
514,408/124,999,991 =
514,408 ÷ 124,999,991 =
0.004115264296 ≈
0