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:
67,357,535 = 5 × 7 × 1,924,501
67,357,535 is a composite number.
77,777,777 = 7 × 11 × 73 × 101 × 137
77,777,777 is a composite number.
67,357,535/77,777,777 =
(67,357,535 ÷ 7) / (77,777,777 ÷ 7) =
9,622,505/11,111,111
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.
67,357,535/77,777,777 =
(5 × 7 × 1,924,501)/(7 × 11 × 73 × 101 × 137) =
((5 × 7 × 1,924,501) ÷ 7) / ((7 × 11 × 73 × 101 × 137) ÷ 7) =
(5 × 1,924,501)/(11 × 73 × 101 × 137) =
9,622,505/11,111,111
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
9,622,505/11,111,111 =
9,622,505 ÷ 11,111,111 =
0.86602545866 ≈
0.87