When the denominators are not the same, you have to rewrite the fractions so that they do have the same denominator. There are two common methods of doing this. The first is the easiest. The second takes more effort but can result in smaller quantities and less reducing. (When the denominators have no common divisors, these two methods are the same.)
The easiest way to get a common denominator is to multiply the first fraction by the second denominator over itself and the second fraction by the first denominator over itself.
Examples
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the first denominator is 2 and the second
denominator is 7. Multiply ½ by).png){kind=small}
and multiply )).png){kind=small}
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Practice
Solutions
“Sumber Informasi”
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Mathematician
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