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: 40/35
- The prime factorizations of the numerator and denominator:
- 40 = 23 × 5
- 35 = 5 × 7
- 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 (40; 35) = 5
40/35 = (40 ÷ 5)/(35 ÷ 5) = 8/7
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
40/35 = (23 × 5)/(5 × 7) = ((23 × 5) ÷ 5)/((5 × 7) ÷ 5) = 8/7
The fraction: 48/42
- 48 = 24 × 3
- 42 = 2 × 3 × 7
- GCF (48; 42) = 2 × 3 = 6
48/42 = (48 ÷ 6)/(42 ÷ 6) = 8/7
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
48/42 = (24 × 3)/(2 × 3 × 7) = ((24 × 3) ÷ (2 × 3))/((2 × 3 × 7) ÷ (2 × 3)) = 8/7
The fractions are equal.
This is one of the simplest cases when comparing two fractions.
Not only are the numerators of the fractions equal but their denominators are also equal.
::: The operation of comparing fractions :::
The final answer: