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: 7/89
7/89 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 7 is a prime number.
- 89 is a prime number.
- GCF (7; 89) = 1
The fraction: 9/99
- The prime factorizations of the numerator and denominator:
- 9 = 32
- 99 = 32 × 11
- 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 (9; 99) = 32 = 9
9/99 = (9 ÷ 9)/(99 ÷ 9) = 1/11
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
9/99 = 32/(32 × 11) = (32 ÷ 32)/((32 × 11) ÷ 32) = 1/11