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: 72/18
- The prime factorizations of the numerator and denominator:
- 72 = 23 × 32
- 18 = 2 × 32
- 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 (72; 18) = 2 × 32 = 18
72/18 = (72 ÷ 18)/(18 ÷ 18) = 4/1 = 4
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
72/18 = (23 × 32)/(2 × 32) = ((23 × 32) ÷ (2 × 32))/((2 × 32) ÷ (2 × 32)) = 4/1 = 4
The fraction: 74/22
- 74 = 2 × 37
- 22 = 2 × 11
- GCF (74; 22) = 2
74/22 = (74 ÷ 2)/(22 ÷ 2) = 37/11
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
74/22 = (2 × 37)/(2 × 11) = ((2 × 37) ÷ 2)/((2 × 11) ÷ 2) = 37/11