Detailed calculations and explanations, below
A common ordinary fraction is made up of
two integer numbers and a fraction bar:
779,422,863,368/899,999,999,990
- The integer number above the bar is called numerator: 779,422,863,368
- The integer number below the bar is called denominator: 899,999,999,990
- 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 = 779,422,863,368 ÷ 899,999,999,990
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:
779,422,863,368 = 2 × 2 × 2 × 71 × 1,151 × 1,192,201 = 23 × 71 × 1,151 × 1,192,201
779,422,863,368 is a composite number.
899,999,999,990 = 2 × 5 × 7 × 13 × 17 × 47 × 491 × 2,521
899,999,999,990 is a composite number.
779,422,863,368/899,999,999,990 =
(779,422,863,368 ÷ 2) / (899,999,999,990 ÷ 2) =
389,711,431,684/449,999,999,995
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.
779,422,863,368/899,999,999,990 =
(23 × 71 × 1,151 × 1,192,201)/(2 × 5 × 7 × 13 × 17 × 47 × 491 × 2,521) =
((23 × 71 × 1,151 × 1,192,201) ÷ 2) / ((2 × 5 × 7 × 13 × 17 × 47 × 491 × 2,521) ÷ 2) =
(22 × 71 × 1,151 × 1,192,201)/(5 × 7 × 13 × 17 × 47 × 491 × 2,521) =
389,711,431,684/449,999,999,995
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
389,711,431,684/449,999,999,995 =
389,711,431,684 ÷ 449,999,999,995 =
0.866025403752 ≈
0.87