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:
7,919,810 = 2 × 5 × 457 × 1,733
7,919,810 is a composite number.
14,849,934 = 2 × 3 × 11 × 71 × 3,169
14,849,934 is a composite number.
7,919,810/14,849,934 =
(7,919,810 ÷ 2) / (14,849,934 ÷ 2) =
3,959,905/7,424,967
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.
7,919,810/14,849,934 =
(2 × 5 × 457 × 1,733)/(2 × 3 × 11 × 71 × 3,169) =
((2 × 5 × 457 × 1,733) ÷ 2) / ((2 × 3 × 11 × 71 × 3,169) ÷ 2) =
(5 × 457 × 1,733)/(3 × 11 × 71 × 3,169) =
3,959,905/7,424,967
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
3,959,905/7,424,967 =
3,959,905 ÷ 7,424,967 =
0.533322909045 ≈
0.53