Simplify the operation
Reduce (simplify) the fractions to their lowest terms equivalents:
- To reduce a fraction to the lowest terms equivalent: divide both the numerator and denominator by their greatest common factor, GCF.
The fraction: - 20/40
- The prime factorizations of the numerator and denominator:
- 20 = 22 × 5
- 40 = 23 × 5
- Multiply all the common prime factors: if there are repeating prime factors we only take them once, and only the ones having the lowest exponent (the lowest powers).
- GCF (20; 40) = 22 × 5 = 20
- 20/40 = - (20 ÷ 20)/(40 ÷ 20) = - 1/2
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
- 20/40 = - (22 × 5)/(23 × 5) = - ((22 × 5) ÷ (22 × 5))/((23 × 5) ÷ (22 × 5)) = - 1/2
The fraction: - 27/44
- 27/44 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 27 = 33
- 44 = 22 × 11
- GCF (27; 44) = 1