Detailed calculations and explanations, below
A common ordinary fraction is made up of
two integer numbers and a fraction bar:
125,000,000,005/225,000,000,000
- The integer number above the bar is called numerator: 125,000,000,005
- The integer number below the bar is called denominator: 225,000,000,000
- 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 = 125,000,000,005 ÷ 225,000,000,000
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:
125,000,000,005 = 5 × 17,573 × 1,422,637
125,000,000,005 is a composite number.
Written with exponents:
225,000,000,000 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 × 5 = 29 × 32 × 511
225,000,000,000 is a composite number.
125,000,000,005/225,000,000,000 =
(125,000,000,005 ÷ 5) / (225,000,000,000 ÷ 5) =
25,000,000,001/45,000,000,000
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.
125,000,000,005/225,000,000,000 =
(5 × 17,573 × 1,422,637)/(29 × 32 × 511) =
((5 × 17,573 × 1,422,637) ÷ 5) / ((29 × 32 × 511) ÷ 5) =
(17,573 × 1,422,637)/(29 × 32 × 510) =
25,000,000,001/45,000,000,000
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
25,000,000,001/45,000,000,000 =
25,000,000,001 ÷ 45,000,000,000 =
0.555555555578 ≈
0.56