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Equivalent fractions are the fractions that have different numerator and denominator but are equal to the same value
Equivalent fractions state that two or more than two fractions are said to be equal if both results are the same fraction after simplification. Let us say, a/b and c/d are two fractions, after the simplification of these fractions, both result in equivalent fraction, say e/f, then they are equal to each other.
step 1 : multiply or divide the numerator and denominator with the same natural number . 
step 2 : the required equivalent fraction is obtained .
step 3 : to obtain many equivalent fractions multiply / divide the numerator & denominator with many no.
1/5 = 1 x 2 / 5 x 2 => 2 / 10  (  multiplying the numerator and denominator by two )
     1/5 = 1 x 3 / 5 x 3 => 3 / 15  (  multiplying the numerator and denominator by three ) 
    1/5 = 1 x 4 / 5 x 4 => 4 / 20  (  multiplying the numerator and denominator by four )
    1/5 = 1 x 5 / 5 x 5 => 5 / 25 (  multiplying the numerator and denominator by five )
    1/5 = 1 x 6 / 5 x 6 => 6 / 30 (  multiplying the numerator and denominator by six )
Therefore ,  2 / 15 , 3 / 15 , 4 / 20 , 5 / 25 , 6 / 30 are five equivalent fractions of  1 / 5 .