Question 116151
the absolute value of a real number is its numerical value 
{{{without}}}{{{ regard}}} to its {{{sign}}}


for example, {{{5}}} is the absolute value of both {{{5}}} and {{{-5}}}
	
|{{{a}}}| =  {{{a}}} if {{{a>=0}}}     and 	|{{{a}}}| =  {{{-a}}} if {{{a<=0}}}     
	
So, you have
a) |{{{3/4}}}| =   {{{3/4}}} 


b){{{-1}}}|{{{-4/5}}}| = {{{- 4/5}}}