Analyze the fractions to be compared and ordered, by category:
positive proper fractions: 97/131, 93/153, 79/163, 84/185, 75/235
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: 97/131
97/131 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 97 is a prime number.
- 131 is a prime number.
- GCF (97; 131) = 1
The fraction: 93/153
- The prime factorizations of the numerator and denominator:
- 93 = 3 × 31
- 153 = 32 × 17
- 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 (93; 153) = 3
93/153 = (93 ÷ 3)/(153 ÷ 3) = 31/51
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
93/153 = (3 × 31)/(32 × 17) = ((3 × 31) ÷ 3)/((32 × 17) ÷ 3) = 31/51
The fraction: 79/163
79/163 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 79 is a prime number.
- 163 is a prime number.
- GCF (79; 163) = 1
The fraction: 84/185
84/185 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 84 = 22 × 3 × 7
- 185 = 5 × 37
- GCF (84; 185) = 1
The fraction: 75/235
- 75 = 3 × 52
- 235 = 5 × 47
- GCF (75; 235) = 5
75/235 = (75 ÷ 5)/(235 ÷ 5) = 15/47
The fraction can also be reduced without calculating GCF; factor the numerator and denominator and cross out all the common prime factors:
75/235 = (3 × 52)/(5 × 47) = ((3 × 52) ÷ 5)/((5 × 47) ÷ 5) = 15/47
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:
97 is a prime number.
31 is a prime number.
79 is a prime number.
84 = 22 × 3 × 7
15 = 3 × 5
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 (97, 31, 79, 84, 15) = 22 × 3 × 5 × 7 × 31 × 79 × 97 = 99,772,260
Calculate the expanding number of each fraction:
Divide the LCM by the numerator of each fraction.
97/131 ⟶ 99,772,260 ÷ 97 = (22 × 3 × 5 × 7 × 31 × 79 × 97) ÷ 97 = 1,028,580
31/51 ⟶ 99,772,260 ÷ 31 = (22 × 3 × 5 × 7 × 31 × 79 × 97) ÷ 31 = 3,218,460
79/163 ⟶ 99,772,260 ÷ 79 = (22 × 3 × 5 × 7 × 31 × 79 × 97) ÷ 79 = 1,262,940
84/185 ⟶ 99,772,260 ÷ 84 = (22 × 3 × 5 × 7 × 31 × 79 × 97) ÷ (22 × 3 × 7) = 1,187,765
15/47 ⟶ 99,772,260 ÷ 15 = (22 × 3 × 5 × 7 × 31 × 79 × 97) ÷ (3 × 5) = 6,651,484
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:
97/131 = (1,028,580 × 97)/(1,028,580 × 131) = 99,772,260/134,743,980
31/51 = (3,218,460 × 31)/(3,218,460 × 51) = 99,772,260/164,141,460
79/163 = (1,262,940 × 79)/(1,262,940 × 163) = 99,772,260/205,859,220
84/185 = (1,187,765 × 84)/(1,187,765 × 185) = 99,772,260/219,736,525
15/47 = (6,651,484 × 15)/(6,651,484 × 47) = 99,772,260/312,619,748