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:
1,176,488 = 2 × 2 × 2 × 199 × 739 = 23 × 199 × 739
1,176,488 is a composite number.
Written with exponents:
4,000,012 = 2 × 2 × 1,000,003 = 22 × 1,000,003
4,000,012 is a composite number.
1,176,488/4,000,012 =
(1,176,488 ÷ 4) / (4,000,012 ÷ 4) =
294,122/1,000,003
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.
1,176,488/4,000,012 =
(23 × 199 × 739)/(22 × 1,000,003) =
((23 × 199 × 739) ÷ 22) / ((22 × 1,000,003) ÷ 22) =
(2 × 199 × 739)/1,000,003 =
294,122/1,000,003
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
294,122/1,000,003 =
294,122 ÷ 1,000,003 =
0.294121117637 ≈
0.29