Question 886930
"The website"?  How and why?  You only need basic computation knowledge.  Maybe some knowledge about order of operations.


{{{(2/3)(1/2)^2+1/2-1}}}
{{{(2/3)(1/4)+1/2-1}}}
{{{(2*1)/(3*2*2)+1/2-1}}}
{{{(1/6)+1/2-1}}},  now you need LCD, here being 6.
{{{1/6+3/6-6/6}}}
{{{(1+3-6)/6}}}
{{{-2/6}}}, reduces to....
{{{highlight(-1/3)}}} which is the opposite of what your website told you.