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:
87,500,000,070 = 2 × 3 × 3 × 5 × 7 × 107 × 1,298,027 = 2 × 32 × 5 × 7 × 107 × 1,298,027
87,500,000,070 is a composite number.
210 = 2 × 3 × 5 × 7
210 is a composite number.
87,500,000,070/210 =
(87,500,000,070 ÷ 210) / (210 ÷ 210) =
416,666,667/1 =
416,666,667
* When it's 1, the denominator of the fraction can be omitted.
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.
87,500,000,070/210 =
(2 × 32 × 5 × 7 × 107 × 1,298,027)/(2 × 3 × 5 × 7) =
((2 × 32 × 5 × 7 × 107 × 1,298,027) ÷ (2 × 3 × 5 × 7)) / ((2 × 3 × 5 × 7) ÷ (2 × 3 × 5 × 7)) =
(3 × 107 × 1,298,027)/1 =
(3 × 107 × 1,298,027) =
416,666,667
* When it's 1, the denominator of the fraction can be omitted.
As a positive improper fraction:
(the numerator > the denominator)
- The integer numbers are a particular case of those fractions that have a denominator equal to 1.
- Any integer number 'n' can be written as a fraction with a denominator of 1. Starting from here, by multiplying both the numerator and the denominator by the same number, an integer number can be written as a multitude of equivalent fractions:
- n = n/1 = (2 × n)/2 = (3 × n)/3 = ...
- Example: 3 = 3/1 = (2 × 3)/2 = 6/2 = (3 × 3)/3 = 9/3 = ...
416,666,667 = 416,666,667/1
As a percentage:
- A percentage value p% is equal to the fraction: p/100, for any decimal number p. So, we need to change the form of the number calculated above, to show a denominator of 100.
- To do that, multiply the number by the fraction 100/100.
- The value of the fraction 100/100 = 1, so by multiplying the number by this fraction the result is not changing, only the form.
416,666,667 =
416,666,667 × 100/100 =
(416,666,667 × 100)/100 =
41,666,666,700/100 =
41,666,666,700%
- In other words:
- (1) Calculate the fraction's value, (2) multiply that number by 100, and (3) add the percent sign % to it.
The final answer:
written in three ways