Analyze the fractions to be compared and ordered, by category:
positive proper fractions: 85/131, 80/133, 69/145, 77/177, 76/225
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: 85/131
85/131 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 85 = 5 × 17
- 131 is a prime number.
- GCF (85; 131) = 1
The fraction: 80/133
80/133 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 80 = 24 × 5
- 133 = 7 × 19
- GCF (80; 133) = 1
The fraction: 69/145
69/145 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 69 = 3 × 23
- 145 = 5 × 29
- GCF (69; 145) = 1
The fraction: 77/177
77/177 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 77 = 7 × 11
- 177 = 3 × 59
- GCF (77; 177) = 1
The fraction: 76/225
76/225 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 76 = 22 × 19
- 225 = 32 × 52
- GCF (76; 225) = 1
Calculate the common numerator
The common numerator is nothing else than the least common multiple (LCM) of the numerators of the fractions.
To calculate the LCM, we need the prime factorization of the numerators:
85 = 5 × 17
80 = 24 × 5
69 = 3 × 23
77 = 7 × 11
76 = 22 × 19
Multiply all the unique prime factors: if there are repeating prime factors we only take them once, and only the ones having the highest exponent (the highest powers).
LCM (85, 80, 69, 77, 76) = 24 × 3 × 5 × 7 × 11 × 17 × 19 × 23 = 137,287,920
Calculate the expanding number of each fraction:
Divide the LCM by the numerator of each fraction.
85/131 ⟶ 137,287,920 ÷ 85 = (24 × 3 × 5 × 7 × 11 × 17 × 19 × 23) ÷ (5 × 17) = 1,615,152
80/133 ⟶ 137,287,920 ÷ 80 = (24 × 3 × 5 × 7 × 11 × 17 × 19 × 23) ÷ (24 × 5) = 1,716,099
69/145 ⟶ 137,287,920 ÷ 69 = (24 × 3 × 5 × 7 × 11 × 17 × 19 × 23) ÷ (3 × 23) = 1,989,680
77/177 ⟶ 137,287,920 ÷ 77 = (24 × 3 × 5 × 7 × 11 × 17 × 19 × 23) ÷ (7 × 11) = 1,782,960
76/225 ⟶ 137,287,920 ÷ 76 = (24 × 3 × 5 × 7 × 11 × 17 × 19 × 23) ÷ (22 × 19) = 1,806,420
Make the numerators of the fractions the same:
- Expand each fraction: multiply both its numerator and denominator by its corresponding expanding number, calculated above.
- This way all the fractions will have the same numerator:
85/131 = (1,615,152 × 85)/(1,615,152 × 131) = 137,287,920/211,584,912
80/133 = (1,716,099 × 80)/(1,716,099 × 133) = 137,287,920/228,241,167
69/145 = (1,989,680 × 69)/(1,989,680 × 145) = 137,287,920/288,503,600
77/177 = (1,782,960 × 77)/(1,782,960 × 177) = 137,287,920/315,583,920
76/225 = (1,806,420 × 76)/(1,806,420 × 225) = 137,287,920/406,444,500