# Common denominator of 2/3+10/15?

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Please see below.

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The denominator of

and denominator of

We can add two fractions only if their denominators are same or common.

As a fraction

hence to find common denominator, we will have to multiply numerator and denominator of each fraction are by a number (albeit different numbers), so that denominators become same.

This is done by identifying Least Common Multiple (LCM) of the two denominators.

Here LCM of

Hence multiplying numerator and denominator of first by

Hence,

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