Question 346097
{{{(1/(y-1))/(2+(1/(y-1)))}}}
Multiply numerator and denominator by {{{(y-1)}}}
{{{(1/(y-1))/(2+(1/(y-1)))= ((y-1)/(y-1))/(2(y-1)+((y-1)/(y-1)))}}}
{{{(1/(y-1))/(2+(1/(y-1)))= 1/(2y-2+1)}}}
{{{(1/(y-1))/(2+(1/(y-1)))= highlight(1/(2y-1))}}}