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# How do we add dissimilar fraction?

Updated: 4/28/2022

Wiki User

7y ago

The first step it to find a common multiple to the denominators. The least common denominator is preferable because it is small but it is not necessary to find the least one. Next, convert each fraction into an equivalent factor with the common multiple as its denominator. Add together all the numerators and place this over the common denominator. Finally, simplify the answer, if possible.

For example

1/4 + 1/5 + 1/6

Find a common multiple: 4*5*6 = 120 (which is also the LCM).

Find equivalent fractions: 1/4 = 30/120, 1/5 = 24/120 and 1/6 = 20/120

So 1/4 + 1/5 + 1/6 = (30 + 24 + 20)/120 = 74/120

Simplify to 37/60.

Wiki User

7y ago

Wiki User

7y ago

To add, subtract, or compare fractions which have different denominators, you must1) Find a common denominator

2) Convert the fractions into equivalent fractions, with that common denominator.

3) Presumably you already know how to add fractions with the same denominator.

Wiki User

7y ago

Convert them to equivalent fractions with common denominators and proceed.