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:
25,000,067 = 19 × 167 × 7,879
25,000,067 is a composite number.
29,999,993 = 19 × 311 × 5,077
29,999,993 is a composite number.
25,000,067/29,999,993 =
(25,000,067 ÷ 19) / (29,999,993 ÷ 19) =
1,315,793/1,578,947
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.
25,000,067/29,999,993 =
(19 × 167 × 7,879)/(19 × 311 × 5,077) =
((19 × 167 × 7,879) ÷ 19) / ((19 × 311 × 5,077) ÷ 19) =
(167 × 7,879)/(311 × 5,077) =
1,315,793/1,578,947
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
1,315,793/1,578,947 =
1,315,793 ÷ 1,578,947 =
0.833335761112 ≈
0.83