Question 637193
{{{7/( 1/4)}}}.....you can write {{{7}}}as {{{7/1}}}

{{{(7/1)/( 1/4)}}}....now we have dual fraction,  and we can apply the rule:

 When you divide two fractions, you take the reciprocal of the second fraction, or bottom fraction, and multiply. (Taking the reciprocal of a fraction means to flip it over.)


{{{(7/1)*( 4/1)=7*4/(1*1)=7*4=28}}}


{{{ 1(3/8)/( 2/4)=((1*8+3)/8)/(2/4)=(11/8)/( 2/4)=(11/8)*( 4/2)=(11/8)*2=(11/cross(8)4)*cross(2)=11/4=2.75}}}