What dose the LCD of two or more fractions mean?

Answer 1

Lowest common denominator

The SMALLEST number that both of the denominators
will divide evenly into.

LCD of 1/5 and 1/6 is 30
LCD of 1/6 and 1/9 is 18

Answer 2

You can convert any pair of fractions to have a common denominator by cross multiplying. For example:

3/4 and 3/5 become:
3/4 * 5 and 3/5 * 4 => 15/20 and 12/20

You could add these two fractions together to get a sum of 27/20. In this case the Lowest Common Denominator is 20, because you can't reduce both fractions.

But in some cases you could. For example:

3/4 and 3/8 become
3/4 * 8 and 3/8 * 4 => 24/32 and 12/32
These fractions can be reduced dividing all the numerators and denominators by 4 to get 6/8 and 3/8.
In this case, 8 is the Lowest Common Denominator.

Answer 3

here's a problem so you can see how it works:

1/8 + 5/24

You need to get the Least Common Denominator for these two fractions; that means you need to discover a number that contains whole number amounts of both 8 and 24. In this case 3 * 8 = 24. So you would multiply 1/8 by 3/3, which equals 3/24.

Now substituting 3/24 for 1/8, you can solve the original expression:
3/24 + 5/24 = 8/24

Finally reduce the result to lowest common terms by dividing both numerator and denominator by 8:
8/8 = 1; 24/8 = 3; answer is 1/3.

Good luck with your math studies! And keep asking good questions!

Answer 4

The 'lowest common denominator' of two fractions is useful because it is the smallest number that can be divided by the denominator of each of the fractions and, therefore, represents the smallest denominator which may be used in an addition or subtraction problem.

For example 1/6 and 1/9 have an LCD of 18 so they may be written as 3/18 and 2/18.


Doug

Answer 5

The LCD of 2 or more fractions means the Least Common Denominator. You can find it on your graphing calculator. For example, the LCD of 2 and 5 is 10. Does that help?

Answer 6

It's the lowest common denominator of a set of fractions. When you reduce the fractions to their lowest forms, it is the denominator that they share.

Like..... 75/100 and 48/64. For each, when you reduce them, they are equivalent to 3/4. In this case, the LCD is 4.

Answer 7

Examples: Lowest Common Denominator

1/4 + 3/8

Because 8 divided by 4 equals 2. The lowest common denominator is 8

1/4 x 2/2 = 2/8

because 2/2 = 1 then we replace 1/4 with 2/8 in the problem

2/8 + 3/8 = 5/8

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Answer 8

the backside subject-unfastened denominator is the smallest extensive type that the denominators of each and every fraction are multiples of. as an occasion the liquid crystal show of two/3 and 5/6 is going to be 6, as a results of fact 6 is the smallest extensive type that the two 3 and six can multiply into.

Answer 9

the oil and liquid crystal display

Answer 10

least common denominator.