hi!
okay say you have the fractions 1/4 and 6/24, these two fractions are equivalent because you can multiply the numerator and the denominator by 6 to get 6/24 (1x6 = 6 and 4x6 = 24).
similarly you can reduce 6/24 to 1/4 by dividing the numerator and denominator by 6 (6/6 = 1 and 24/6 = 4).
i hope this helped!