Detailed calculations and explanations, below
A common ordinary fraction is made up of
two integer numbers and a fraction bar:
779,422,863,520/900,000,000,190
- The integer number above the bar is called numerator: 779,422,863,520
- The integer number below the bar is called denominator: 900,000,000,190
- 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 = 779,422,863,520 ÷ 900,000,000,190
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:
779,422,863,520 = 2 × 2 × 2 × 2 × 2 × 5 × 7 × 695,913,271 = 25 × 5 × 7 × 695,913,271
779,422,863,520 is a composite number.
900,000,000,190 = 2 × 5 × 90,000,000,019
900,000,000,190 is a composite number.
779,422,863,520/900,000,000,190 =
(779,422,863,520 ÷ 10) / (900,000,000,190 ÷ 10) =
77,942,286,352/90,000,000,019
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.
779,422,863,520/900,000,000,190 =
(25 × 5 × 7 × 695,913,271)/(2 × 5 × 90,000,000,019) =
((25 × 5 × 7 × 695,913,271) ÷ (2 × 5)) / ((2 × 5 × 90,000,000,019) ÷ (2 × 5)) =
(24 × 7 × 695,913,271)/90,000,000,019 =
77,942,286,352/90,000,000,019
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
77,942,286,352/90,000,000,019 =
77,942,286,352 ÷ 90,000,000,019 =
0.866025403728 ≈
0.87