Question

How can equivalent

Answer 1

Because, well, without them how are you able to add and subtract fractions :D
It is according to the laws of mathematics that you cannot add or subtract fractions that have different denominators to each other. So you need to make your fractions having the same denominator so that they are able to be added or subtracted (hence the equivalent fractions - making the denominators the same are making the fractions equivalent)

Answer 2

Explanation:

Equivalent fractions could help you add and subtract fractions since they help solve them much easier. For example, if you had 14/4 - 12/4 would be easier, since their equivalent fractions. If you had 14/4 - 6/8, it would be harder since you have to make it equivalent and subtract it with the same base

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