Best Answer

When comparing fractions you must find a common denominator; by finding the least common denominator it will keep the numbers (numerators and denominator) smaller .

User Avatar

Wiki User

12y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Is it always necessary to find the least common denominator to compare the sizes of fractions?
Write your answer...
Still have questions?
magnify glass
Related questions

Is it always necessary to find the LCD to compare the sizes of fractions explain?


How to add fractions having similar numerators but different denominators?

The first step, to add, subtract, or compare fractions, is always to convert the fractions to equivalent fractions, that all have the same denominator. You can use one of several techniques to get the LEAST common denominator, or simply multiply the two denominators to get a common denominator (which in this case may, or may not, be the smallest common denominator).

Is four sevenths the same as two fifths?

To compare two fractions, find a common denominator (multiplying the two denominators will always give you a common denominator), convert both fractions to the common denominator, then compare. Another - actually easier - way to compare two fractions is to convert both to decimal. Just pick up a calculator, and divide the numerator by the denominator.

What is a unit rate where the the denominator is one unit?

its always going to be in the denominator of 2 fractions.

What fractions will equal to 1?

Fractions will always equal 1 when their numerator is the same as their denominator

When adding fractions what you always must do is find the?

Common denominator

What is always needed when adding and subtracting fractions?

a common denominator

Is the least common denominator of two fraction is always greater than the denominator of the fractions?

Not always. If one denominator is a multiple of the other, the LCD will be the larger one.

What is the simalarites betweenproer and improper fractions?

Both proper and improper fractions have a numerator and a denominator. In a proper fraction the numerator is always less than the denominator. In an improper function the numerator is greater than the denominator

What is true about the numerators of two like fractions with a sum of 1?

That their sum is always equal to the denominator.

Is the product of two denominators always a common denominator?

Only if you have just two fractions.

Why do you compare percents and not actual numbers?

Its probably easier if you see percentage as a fraction (always with a denominator of 100) this puts it in the same area as other commonly used fractions such as one half, one quarter etc.