Question 545465
factors of one are fractions where the numerator equals the denominator, so the fraction is equal to one


{{{(42y^6)/(49y^3)}}} = {{{(7*6*y^3*y^3)/(7*7*y^3)}}} = {{{(7/7)(y^3/y^3)((6*y^3)/7)}}}


factoring out the "ones" leaves you with a reduced fraction