You can cross multiply if there are two fractions to compare.
EXAMPLE: 1 2 If you multiply the lower right #
__________ = __________ by the upper left # you will get 4 for
2 4 the left side and if you multiply the
lower left by the upper right you will
4 also. compare the numbers for
each side and you get "equal to"
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Convert unlike fractions to equivalent fractions with common denominators by finding the LCM of the denominators.
Unlike. Unlike. Unlike. Unlike.
Like fractions have the same denominators (bottom part of fraction), unlike fractions do not.
If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator.
unlike denominators: the bottom number of a fraction. to have unlike denominators you must have two fractions with a different number on the bottom of each fraction.