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:
4,622 = 2 × 2,311
4,622 is a composite number.
Written with exponents:
123,760 = 2 × 2 × 2 × 2 × 5 × 7 × 13 × 17 = 24 × 5 × 7 × 13 × 17
123,760 is a composite number.
4,622/123,760 =
(4,622 ÷ 2) / (123,760 ÷ 2) =
2,311/61,880
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.
4,622/123,760 =
(2 × 2,311)/(24 × 5 × 7 × 13 × 17) =
((2 × 2,311) ÷ 2) / ((24 × 5 × 7 × 13 × 17) ÷ 2) =
2,311/(23 × 5 × 7 × 13 × 17) =
2,311/61,880
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
2,311/61,880 =
2,311 ÷ 61,880 =
0.037346477052 ≈
0.04