Fractions are determined to be equivalent by multiplying the numerator and denominator of one fraction by the same number. ... Fractions equivalent to 1/2 are 2/4, 3/6, 4/8, 5/10, 6/12 ... Fractions equivalent to 1/3 are 2/6, 3/9, 4/12, 5/15, ... Fractions equivalent to 1/4 are 2/8, 3/12, 4/16, 5/20, ...