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:
416,666,685 = 3 × 5 × 17 × 1,633,987
416,666,685 is a composite number.
Written with exponents:
500,000,000 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 = 28 × 59
500,000,000 is a composite number.
416,666,685/500,000,000 =
(416,666,685 ÷ 5) / (500,000,000 ÷ 5) =
83,333,337/100,000,000
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.
416,666,685/500,000,000 =
(3 × 5 × 17 × 1,633,987)/(28 × 59) =
((3 × 5 × 17 × 1,633,987) ÷ 5) / ((28 × 59) ÷ 5) =
(3 × 17 × 1,633,987)/(28 × 58) =
83,333,337/100,000,000
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
83,333,337/100,000,000 =
83,333,337 ÷ 100,000,000 =
0.83333337 ≈
0.83