Dissimilar fractions can be added by finding the LOWEST COMMON DENOMINATOR (The smallest number you can convert both denominators *i.e. the bottom number of a fraction* to)
For example, if you were to add 3/8 and 1/2, you can convert both to /8, getting 3/8 + 4/8 = 7/8.
In more difficult examples, say you have 3/7 + 1/3, the LCD here is 21, so converting both to /21, we get 9/21+7/21 = 16/21
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By finding their lowest common denominator
A dissimilar fraction is a fraction where the denominator is not the same as the others .
You have to convert them to equivalent similar fractions (fractions with the same denominator) first.
You must first convert the fractions to a common denominator. Then just add the numerators (the top part of the fraction).
A proper fraction is one fraction in which the numerator is smaller than the denominator. Dissimilar fractions are two or more fractions whose denominators are different (dissimilar).