The easiest way is cross multiplication.
A fraction a/b = c/d if and only if ad = bc
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Answer: When adding or subtracting fractions with different denominators it is important to change the denominators into the lowest common denominator by using equivalent fractions. Answer: Equivalent fractions are used to: * Simplify fractions. It is sort of inelegant to write the final solution of a problem as 123/246, when you can just as well write it as 1/2. * Add fractions. If two fractions have different denominators, you need to convert them to equivalent fractions that have the same denominator. Only then can you add. * Subtract fractions (same as addition). * Compare fractions, to check which one is larger (same as addition).
Yes! If your fractions are equivalent.
Equivalent fractions are fractions that are equal. So, 1/2 and 2/4 are equivalent.