Compare the Two Common Fractions 157/138 and 163/145, Which One is Larger? Online Calculator
Fractions 157/138 and 163/145 are compared by building equivalent fractions, which have either equal denominators or equal numerators
To compare and sort multiple fractions, they should either have the same denominator or the same numerator.
The operation of comparing fractions:
157/138 and 163/145
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: 157/138
157/138 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 157 is a prime number.
- 138 = 2 × 3 × 23
- GCF (157; 138) = 1
The fraction: 163/145
163/145 is already reduced to the lowest terms.
The numerator and denominator have no common prime factors:
- 163 is a prime number.
- 145 = 5 × 29
- GCF (163; 145) = 1
To compare and sort the fractions, make their denominators the same.
To make the fractions' denominators the same - we have to:
- 1) calculate their common denominator
- 2) then calculate the expanding number of each fraction
- 3) expand the fractions to equivalent forms having the same denominator
Calculate the common denominator
The common denominator is nothing else than the least common multiple (LCM) of the denominators of the fractions.
To calculate the LCM, we need the prime factorization of the denominators:
138 = 2 × 3 × 23
145 = 5 × 29
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 (138, 145) = 2 × 3 × 5 × 23 × 29 = 20,010
Calculate the expanding number of each fraction:
Divide the LCM by the denominator of each fraction.
157/138 ⟶ 20,010 ÷ 138 = (2 × 3 × 5 × 23 × 29) ÷ (2 × 3 × 23) = 145
163/145 ⟶ 20,010 ÷ 145 = (2 × 3 × 5 × 23 × 29) ÷ (5 × 29) = 138
Make the denominators 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 denominator:
157/138 = (145 × 157)/(145 × 138) = 22,765/20,010
163/145 = (138 × 163)/(138 × 145) = 22,494/20,010
The fractions have the same denominator, compare their numerators.
The larger the numerator the larger the positive fraction.
The larger the numerator the smaller the negative fraction.
::: The operation of comparing fractions :::
The final answer:
The fractions sorted in ascending order:
22,494/20,010 < 22,765/20,010
The initial fractions sorted in ascending order:
163/145 < 157/138
How are the numbers written: comma ',' used as a thousands separator; point '.' as a decimal separator; numbers rounded off to max. 12 decimals (if the case). Used symbols: '/' the fraction bar; ÷ dividing; × multiplying; + plus (adding); - minus (subtracting); = equal; ≈ approximately equal.
Compare and sort common fractions, online calculator: