The reason we want to reduce fractions to lowest terms is that even though a fraction like 630/945 is actually the same as 2/3, that isn’t obvious to us when we look at it since the numbers are so big. But if we simplify that larger fraction down to 2/3, then we’ll be able to easily tell that we have “2 out of 3 parts.”
Read MoreIn this lesson we’ll look at how to reduce rational expressions and how cancelling can be a useful technique to help us reduce them. To reduce a fraction or a rational expression there must be a common factor in all of the parts that are being added or subtracted.
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