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:
2,057,628 = 2 × 2 × 3 × 171,469 = 22 × 3 × 171,469
2,057,628 is a composite number.
499,999,954 = 2 × 17 × 14,705,881
499,999,954 is a composite number.
2,057,628/499,999,954 =
(2,057,628 ÷ 2) / (499,999,954 ÷ 2) =
1,028,814/249,999,977
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.
2,057,628/499,999,954 =
(22 × 3 × 171,469)/(2 × 17 × 14,705,881) =
((22 × 3 × 171,469) ÷ 2) / ((2 × 17 × 14,705,881) ÷ 2) =
(2 × 3 × 171,469)/(17 × 14,705,881) =
1,028,814/249,999,977
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
1,028,814/249,999,977 =
1,028,814 ÷ 249,999,977 =
0.004115256379 ≈
0