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:
702 = 2 × 3 × 3 × 3 × 13 = 2 × 33 × 13
702 is a composite number.
Written with exponents:
80,052 = 2 × 2 × 3 × 7 × 953 = 22 × 3 × 7 × 953
80,052 is a composite number.
702/80,052 =
(702 ÷ 6) / (80,052 ÷ 6) =
117/13,342
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.
702/80,052 =
(2 × 33 × 13)/(22 × 3 × 7 × 953) =
((2 × 33 × 13) ÷ (2 × 3)) / ((22 × 3 × 7 × 953) ÷ (2 × 3)) =
(32 × 13)/(2 × 7 × 953) =
117/13,342
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
117/13,342 =
117 ÷ 13,342 =
0.008769299955 ≈
0.01