Detailed calculations and explanations, below
A common ordinary fraction is made up of
two integer numbers and a fraction bar:
779,422,863,345/899,999,999,997
- The integer number above the bar is called numerator: 779,422,863,345
- The integer number below the bar is called denominator: 899,999,999,997
- The fraction bar means that the numerator is divided by the denominator.
- To get the fraction's value divide the numerator by the denominator:
The value = 779,422,863,345 ÷ 899,999,999,997
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:
779,422,863,345 = 3 × 5 × 7 × 7,423,074,889
779,422,863,345 is a composite number.
899,999,999,997 = 3 × 7 × 683 × 953 × 65,843
899,999,999,997 is a composite number.
779,422,863,345/899,999,999,997 =
(779,422,863,345 ÷ 21) / (899,999,999,997 ÷ 21) =
37,115,374,445/42,857,142,857
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.
779,422,863,345/899,999,999,997 =
(3 × 5 × 7 × 7,423,074,889)/(3 × 7 × 683 × 953 × 65,843) =
((3 × 5 × 7 × 7,423,074,889) ÷ (3 × 7)) / ((3 × 7 × 683 × 953 × 65,843) ÷ (3 × 7)) =
(5 × 7,423,074,889)/(683 × 953 × 65,843) =
37,115,374,445/42,857,142,857
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
37,115,374,445/42,857,142,857 =
37,115,374,445 ÷ 42,857,142,857 =
0.86602540372 ≈
0.87