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:
2,057,645 = 5 × 411,529
2,057,645 is a composite number.
Written with exponents:
499,999,995 = 3 × 3 × 5 × 11 × 73 × 101 × 137 = 32 × 5 × 11 × 73 × 101 × 137
499,999,995 is a composite number.
2,057,645/499,999,995 =
(2,057,645 ÷ 5) / (499,999,995 ÷ 5) =
411,529/99,999,999
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.
2,057,645/499,999,995 =
(5 × 411,529)/(32 × 5 × 11 × 73 × 101 × 137) =
((5 × 411,529) ÷ 5) / ((32 × 5 × 11 × 73 × 101 × 137) ÷ 5) =
411,529/(32 × 11 × 73 × 101 × 137) =
411,529/99,999,999
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
411,529/99,999,999 =
411,529 ÷ 99,999,999 =
0.004115290041 ≈
0